Four or more generations of descendants of Isabel de Vere (c1222-aft1299) if they are properly linked:
1. Isabel de Vere (c1222-aft1299)
- 2. Hugh Courtenay (1249-1290)
- 3. Eleanor Courtenay (c1263-1301)
- 4. Richard de Grey, 2nd Baron Grey of Codnor (1281-1334)
- 5. Jane de Grey (c1302-1369) ... (more)
- 5. John de Grey, 3rd Baron Grey de Codnor (c1307-1392) ... (more)
- 5. Robert de Grey, 1st Baron Fitzpayn (c1321-1393) ... (more)
- 5. Gilbert de Grey ... (more)
- 5. Henry de Grey ... (more)
- 4. Nicholas de Grey (?-?)
- 4. Lucy de Grey
- 4. Joan de Grey
- 4. Thomas de Grey
- 4. Henry de Grey
- 5. Richard de Grey (c1195-c1250) ... (more)
- 5. John de Grey (c1200-1267) ... (more)
- 5. William de Grey (c1204-1287) ... (more)
- 5. Robert de Grey (c1206-1256) ... (more)
- 5. Walter de Grey (c1208-1255) ... (more)
- 5. Henry de Grey (c1210-) ... (more)
- 4. Richard de Grey, 2nd Baron Grey of Codnor (1281-1334)
- 3. Hugh de Courtenay, 9th Earl of Devon (1276-1340)
- 4. Hugh Courtenay, 10th Earl of Devon (1303-1377)
- 5. Hugh Courtenay (1326-c1349) ... (more)
- 5. Margaret Courtenay (c1326-1385) ... (more)
- 5. Edward Courtenay (c1329-1372) ... (more)
- 5. Thomas Courtenay (c1331-c1381) ... (more)
- 5. Elizabeth Courtenay (c1333-1395) ... (more)
- 5. Catherine Courtenay (Abt 1335-1399) ... (more)
- 5. Joan Courtenay (c1337-?) ... (more)
- 5. Philip Courtenay (c1340-1406) ... (more)
- 5. William Courtenay (1342-1396) ... (more)
- 5. Matilda Courtenay (?-?) ... (more)
- 5. Guinora Courtenay (1348-?) ... (more)
- 5. Isabel Courtenay (?-?) ... (more)
- 5. Phillipa Courtenay (?-?) ... (more)
- 5. Anne Courtenay (Abt 1351-?) ... (more)
- 4. John Courtneay (c1305-c1349)
- 4. Eleanor Courtenay (c1309-c1330)
- 4. Robert Courtenay (c1309-c1334)
- 4. Thomas Courtenay (c1311-c1356)
- 4. Elizabeth Courtenay (c1313-)
- 4. Baldwin de Courtenay (Abt 1313-?)
- 4. Hugh Courtenay, 10th Earl of Devon (1303-1377)
- 3. Isabel Courtenay (c1283-?)
- 3. Egeline Courtenay (c1287-1335)
- 3. Eleanor Courtenay (c1263-1301)