Simon De Grandison 
Simon De was born before 1429. Simon De's father was Guillaume De Grandison and his mother is Jeanne De Vienne. His paternal grandparents were Jean I De Grandison and Catherine De Neufchatel. He had a sister named Louise De. He was the younger of the two children. He died after November 24th, 1486.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.~ 1255 d.03 Jul 1349
- b.~ 1305 d.>13 Jul 1374
- b.~ 1272
- b.~ 1328 d.1381
- b.~ 1308
- b.~ 1371 d.28 Sep 1396
- b.~ 1248 d.1310
- b.~ 1263 d.1360
- b.~ 1248
- b.~ 1330 d.01 Nov 1398
- b.~ 1295 d.< 1356
- b.~ 1393 d.1428
- d.BET 1336 AND 1337
- b.~ 1310 d.1366
- b.~ 1337 d.<21 Jan 1401
- b.1292 d.1362
- b.~ 1317 d.~ 1342
- b.~ 1295 d.>13 May 1362
- b.~ 1370 d.20 Jul 1431
- b.< 1267 d.~ 1302
- b.< 1303
- b.~ 1280
- d.~ 1397
- d.28 Nov 1336
- b.~ 1308
- b.~ 1272 d.10 Sep 1344
- b.< 1429 d.>24 Nov 1486
- b.~ 1395
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‌Simon De and Catherine De were married in a religious ceremony on April 17th, 1458. They had a son named Helyon II De.