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Bertha of Flanders was born circa 990 to Matilda de Bourgogne (969-c1016) . She married Gerhard III. von Egisheim (?-1038) . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899). Ancestors are from France, the United Kingdom, Germany, Belgium.
Note that French and Dutch Wikipedia claim (without references) that she is the daughter of  Baldwin III, Count of Flanders.


Offspring of Bertha of Flanders and Gerhard III. von Egisheim (?-1038)
Name Birth Death Joined with
Gerold II de Geneve (c1020-1080) 1020 1080 Gisèle (-1060)
Thetberge von Rheinfelden (c1045-c1092)

Conon de Geneve (c1025-1107) 1025 1107
Hildegard von Egisheim (c1024-c1094) 1024 1094 Friedrich von Büren (c1020-aft1053)

Footnotes (including sources)

‡ General
Ω Birth
  • year of birth from mother's and son's