Cosmo Claude D' Ongnies 
Cosmo Claude D' was born about 1638. Cosmo Claude D''s father is Balthazar Guillaume D' Ongnies and his mother is Agnes De Montmorency. His paternal grandfather was Claude D' Ongnies and his paternal grandmother is Anne De Croy; his maternal grandparents are Georges De Montmorency and Laura Affaitadi. He was an only child. He died in 1709.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>), O.Guionneau, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>)
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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.~ 1595 d.10 Jan 1641
- b.~ 1615
- b.~ 1470 d.1545
- b.1508 d.07 Feb 1587
- b.~ 1480
- b.1562 d.04 Feb 1613
- b.1487 d.12 Sep 1543
- b.1525 d.05 Jul 1610
- b.25 Jan 1500 d.25 May 1560
- b.~ 1598
- b.1496 d.1549 in Brussels, Belgium
- b.01 Dec 1527 d.01 Aug 1565
- b.22 Feb 1502 d.06 Aug 1539
- b.<May 1566 d.13 May 1608
- b.~ 1505 d.May 1561
- b.12 Dec 1533 d.09 Nov 1586
- b.~ 1510 d.17 Feb 1551
- b.~ 1638 d.1709
- b.~ 1490 d.< 1544
- b.~ 1513 d.< 1548
- b.~ 1497
- b.~ 1532 d.~ 1579
- b.~ 1515
- b.~ 1570
- b.1532 d.1580
- b.~ 1618
- b.~ 1585
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‌Cosmo Claude D' and Isabelle Therese De were married in a religious ceremony in 1678. They had a son named Antoine Henri D'.