Guillaume De Grandison 
Guillaume De was born about 1393. Guillaume De's father was Jean I De Grandison and his mother was Catherine De Neufchatel. His paternal grandparents were Jacques De Grandison and Marguerite De Vergy; his maternal grandparents were Thibault VI De Neufchatel and Marguerite De Bourgogne. He had a sister named Henriette De. He was the younger of the two children. He died in 1428.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>) http://geneastar.org.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.~ 1224 d.~ 1295
- b.~ 1255 d.03 Jul 1349
- b.~ 1230
- b.~ 1305 d.>13 Jul 1374
- b.~ 1245
- b.~ 1272
- b.~ 1250 d.1300
- b.~ 1328 d.1381
- b.~ 1308
- b.~ 1371 d.28 Sep 1396
- b.~ 1220 d.1263
- b.~ 1248 d.1310
- b.~ 1228 d.31 Mar 1277
- b.~ 1263 d.1360
- b.~ 1218
- b.~ 1248
- b.~ 1230 d.1273
- b.~ 1330 d.01 Nov 1398
- b.~ 1295 d.< 1356
- b.~ 1393 d.1428
- d.~ 1304
- d.BET 1336 AND 1337
- b.~ 1250 d.< 1324
- b.~ 1310 d.1366
- b.~ 1337 d.<21 Jan 1401
- b.~ 1265 d.09 Aug 1304 in Battle of Mons en Puelle
- b.1292 d.1362
- b.~ 1273 d.~ 1324
- b.~ 1317 d.~ 1342
- b.~ 1255
- b.~ 1295 d.>13 May 1362
- b.~ 1271 d.1317
- b.~ 1370 d.20 Jul 1431
- b.1220 d.12 Nov 1266
- b.< 1267 d.~ 1302
- b.~ 1222 d.08 Mar 1279
- b.< 1303
- b.~ 1244 d.>10 Nov 1331
- b.~ 1280
- b.~ 1255
- d.~ 1397
- d.14 May 1301
- d.28 Nov 1336
- b.~ 1308
- b.~ 1250 d.23 Aug 1295
- b.~ 1272 d.10 Sep 1344
- b.~ 1255
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