| | Godwin c. 1001β1053 Earl of Wessex |
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Earl of Hereford (1st creation), 1043 | | Earl of Hereford (3rd creation), 1058 | | | | | | | | | | Earl of Hereford (2nd creation), 1052 | | Earl of Hereford (4th creation), 1067 |
Sweyn Godwinson 1020β1052 Earl of Hereford | | Harold Godwinson (c. 1022β1066) Earl of Hereford, King of the English | | William de Mandeville (d. before 1130) | | | | | | Ralph the Timid d. 1057 Earl of Hereford | | William FitzOsbern 1011β1071 1st Earl of Hereford |
Earldom of Hereford (1st creation) forfeit, 1051 | | Earldom of Hereford (3rd creation) extinct, 1066 | | | | | | | | | | | | Earldom of Hereford (2nd creation) extinct, 1057 | | | | | |
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| | | | | | | | | | | | | Earl of Essex (1st creation), 1140 | | | | | | | | | | | Earl of Hereford (5th creation), 1141 |
| | | | William de Say I | | Beatrice ("Beatrix") de Say d. 1197 | | Geoffrey de Mandeville d. 1144 1st Earl of Essex | | | | | | Roger de Breteuil 1058β after 1087 2nd Earl of Hereford | | Miles of Gloucester d. 1143 1st Earl of Hereford |
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| | | | | | | | | | | | | | | | | | | | | | Earldom of Hereford (4th creation) forfeit, 1074 | | | | | |
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| | | | William de Say II d. 1184 | | Geoffrey de Saye I d. 1214 | | Geoffrey de Mandeville d. 1166 2nd Earl of Essex | | William de Mandeville d. 1189 3rd Earl of Essex | | Margaret of Hereford 1122/1123β1197 | | Roger Fitzmiles before 1125β1155 2nd Earl of Hereford |
| | | | | | | | | | | | | | | | | | Earldom of Essex (1st creation) extinct, 1189 | | | | | | | Earldom of Hereford (5th creation) extinct, 1155 |
Earl of Essex (2nd creation), 1199 | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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Geoffrey Fitz Peter c. 1162β1213 1st Earl of Essex | | Beatrice de Say | | Geoffrey de Saye II 1155β1230 | | Hawise ("Alice") de Clare | | Humphrey III de Bohun before 1144β1181 |
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| | | | | | | | | | | | | | | | | | Earl of Hereford (6th creation), 1199 |
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| | | | Geoffrey FitzGeoffrey de Mandeville c. 1191β1216 2nd Earl of Essex | | William FitzGeoffrey de Mandeville d. 1227 3rd Earl of Essex | | Maud FitzGeoffrey Maud de Mandeville | | Henry de Bohun 1176β1220 1st Earl of Hereford |
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| | | | | | | | Earldom of Essex (2nd creation) extinct, 1227 | | | | | | | | |
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| | | | | | | | | | | | Earl of Essex (3rd creation), 1239 |
| | | | | | | | | | | | Humphrey de Bohun 1204β1275 1st Earl of Essex, 2nd Earl of Hereford | |
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| | | | | | | | | | | | Humphrey de Bohun d. 1265 | |
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| | | | Edward I 1239β1307 King of England | | | | | | Humphrey de Bohun c. 1249β1298 2nd Earl of Essex, 3rd Earl of Hereford |
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| | | | Edward II 1284β1327 King of England | | Elizabeth of Rhuddlan 1282β1316 | | Humphrey de Bohun 1276β1322 3rd Earl of Essex, 4th Earl of Hereford |
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| | | | Edward III 1312β1377 King of England | | John de Bohun 1306β1336 4th Earl of Essex, 5th Earl of Hereford | | Humphrey de Bohun 1309β1361 5th Earl of Essex, 6th Earl of Hereford | | William de Bohun c. 1312β1360 1st Earl of Northampton |
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| | | | | | | | | | | | | | | | | Humphrey de Bohun 1342β1373 6th Earl of Essex, 7th Earl of Hereford |
| | | | | | | | | | | | | | | | | Earldom of Essex (3rd creation) and Earldom of Hereford (6th creation) extinct, 1373 |
| | | | Earl of Essex (4th creation), 1376 | | | | | | | | | | | | | | |
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| | | | Thomas of Woodstock 1355β1397 Earl of Essex | | Eleanor de Bohun c. 1366β1399 | | | | | | Mary de Bohun c. 1369/1370β1394 | | Henry IV 1367β1413 King of England |
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| | | | Earldom of Essex (4th creation) forfeit, 1397 | | | |
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| | | | William Bourchier 1374β1420 | | Anne of Gloucester 1383β1438 |
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| | | | Earl of Essex (5th creation), 1461 |
| | | | Henry Bourchier c. 1404/1406β1483 1st Earl of Essex |
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| | | | William Bourchier d. 1480 Viscount Bourchier | | Anne Woodville 1438β1489 | | Elizabeth Woodville c. 1437β1492 | | Edward IV 1442β1483 King of England |
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John Devereux c. 1464β1501 9th Baron Ferrers of Chartley | | Cecily Bourchier (died c. 1492/1493) | | Henry Bourchier c. 1467/80β1540 2nd Earl of Essex | | | | | | Elizabeth of York 1466β1503 | | Thomas Parr 1478β1517 |
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| | | | | | | | | Earldom of Essex (5th creation) forfeit 1540 | | | | | | | | | | | | | | | | |
Viscount Hereford | | | | | | | | | | Earl of Essex (6th creation), 1540 | | | | | | | | | | | | |
Walter Devereux 1488β1558 1st Viscount Hereford, 10th Baron Ferrers of Chartley | | | | | | | | | | Thomas Cromwell 1485β1540 Earl of Essex | | Henry VIII 1491β1547 King of England | | | | | | | | | | | |
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| | | | | | | | | | | | | | Earldom of Essex (6th creation) forfeit, 1540 | | | | | | | | | | | | Earl of Essex (7th creation), 1543 |
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Richard Devereux c. 1513β1547 | | | | | | | | | | | | | | | | | | | | Catherine Parr 1512β1548 | | William Parr 1513β1571 Marquess of Northampton, Earl of Essex |
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| | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Essex (7th creation) forfeit 1553, restored 1559, extinct 1571 |
Earl of Essex (8th creation), 1572 | | | | | | Devereux Baronet of Castle Bromwich, 1611 |
Walter Devereux 1541β1576 1st Earl of Essex, 2nd Viscount Hereford | | | | | | Edward Devereux c. 1550β1622 1st Baronet |
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Robert Devereux 1565β1601 2nd Earl of Essex, 3rd Viscount Hereford | | | | | | | | | | Walter Devereux 1578β1658 5th Viscount Hereford, 2nd Baronet | | | | | | George Devereux c. 1581β1665 |
Earldom of Essex forfeit, 1601 | | | | | | | | | | | | | | | | | | | | | | |
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Earldom of Essex (8th creation) restored, 1604 | | Baron Capell of Hadham, 1641 | | | | | | | | | | | | | | | | | | |
Robert Devereux 1591β1646 3rd Earl of Essex, 4th Viscount Hereford | | Arthur Capell 1604β1649 1st Baron Capell of Hadham | | | | | | Leicester Devereux 1617β1676 6th Viscount Hereford, 3rd Baronet | | | | | | | | | |
Earldom of Essex (8th creation) extinct, 1646 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | Earl of Essex (9th creation) and Viscount Malden, 1661 | | Baron Capell of Tewkesbury in the County of Gloucester, 1692 | | | | | | | | | | | | | | | | | | | | |
| | | | Arthur Capell 1631β1683 2nd Baron Capell of Hadham 1st Earl of Essex and Viscount Malden | | Henry Capell 1638β1696 Baron Capell of Tewkesbury | | | | | | | | | | | | Price Devereux c. 1637β1673 | | Vaughan Devereux d. 1700 |
| | | | | | | | | Barony Capell of Tewkesbury extinct, 1696 | | | | | | | | | | | | | | | | | | | | |
| | | | Algernon Capell 1670β1710 2nd Earl of Essex and Viscount Malden | | | | | | Leicester Devereux 1674β1683 7th Viscount Hereford, 4th Baronet | | Edward Devereux 1675β1700 8th Viscount Hereford, 5th Baronet | | Price Devereux 1664β1740 9th Viscount Hereford, 6th Baronet | | Arthur Devereux d. 1711 |
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| | | | William Capell 1697β1743 3rd Earl of Essex and Viscount Malden | | | | | | | | | | | | | | Price Devereux 1694β1748 10th Viscount Hereford, 7th Baronet | | Edward Devereux c. 1710β1760 11th Viscount Hereford, 8th Baronet |
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Frances Hanbury-Williams c. 1735β1759 | | William Capell 1732β1799 4th Earl of Essex and Viscount Malden | | Harriet Bladen 1735β1821 | | | | | | | | | | Edward Devereux 1740β1783 12th Viscount Hereford, 9th Baronet | | George Devereux 1744β1804 13th Viscount Hereford, 10th Baronet |
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| | | | George Capel-Coningsby 1757β1839 5th Earl of Essex and Viscount Malden | | John Thomas Capell 1769β1819 | | | | | | | | | | | | | | Henry Fleming Lea Devereux 1777β1843 14th Viscount Hereford, 11th Baronet |
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Arthur Algernon Capell 1803β1892 6th Earl of Essex and Viscount Malden | | Algernon Capell 1807β1886 | | Adolphus Capell 1813β1899 | | | | | | | | | | Henry Devereux 1807β1839 | | Robert Devereux 1809β1855 15th Viscount Hereford, 12th Baronet |
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Arthur de Vere Capell 1826β1879 styled Viscount Malden | | Charles Capell 1845β1924 | | Horatio Bladen Capell 1839β1933 | | | | | | | | | | | | | | Robert Devereux 1843β1930 16th Viscount Hereford, 13th Baronet |
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George Devereux de Vere Capell 1857β1916 7th Earl of Essex and Viscount Malden | | Arthur Algernon de Vere Capell 1891β1950 | | Horace Charles George Arthur Capell 1868β1953 | | Algernon Essex Capell 1869β1952 | | Henry Addison Devereux Capell 1873β1925 | | | | | | Robert Charles Devereux 1865β1952 17th Viscount Hereford, 14th Baronet |
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Algernon George de Vere Capell 1884β1966 8th Earl of Essex and Viscount Malden | | | | | | | Bladen Ozro Capell 1897β1959 | | Algernon Arthur Capell | | Robert Capell Sixth in lineββto the Earldom of Essex | | | | | | Robert Devereux 1894β1934 | |
| | | | | Earldom of Essex (9th creation) revived, 1989 | | | | | | | | | | | | | | | | | | | | | | | |
Reginald George de Vere Capell 1906β1981 9th Earl of Essex and Viscount Malden | | Robert Edward de Vere Capell 1920β2005 10th Earl of Essex and Viscount Malden | | Bladen Horace Capell 1922β1978 | | Colin Capell | | | | | | | | | | Robert Milo Leicester Devereux 1932β2004 18th Viscount Hereford, 15th Baronet |
Earldom of Essex (9th creation) dormant, 1981 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | Frederick Paul de Vere Capell b. 1944 11th Earl of Essex and Viscount Malden | | William Jennings "Bill" Capell b. 1952 Heir presumptive to the Earldom of Essex | | Clint Capell Third in line to the Earldom of Essex | | Craig Capell Fourth in line to the Earldom of Essex | | | | | | | | | |
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| | | | | | | | Kevin Capell b. 1982 Second in line to the Earldom of Essex | | | | | | Dylan Capell Fifth in line to the Earldom of Essex | | | | | | Charles Robin de Bohun Devereux b. 1975 19th Viscount Hereford, 16th Baronet |
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| | | | | | | | | | | | | | | | | | | | | | | | Henry Devereux b. 2015 |
| | | | | | | | | | | | | | | | | | | | | | | | Heir apparent to the Hereford Viscountcy |