Robert I the Friesian of Flanders, Count of Flanders, was born circa 1032 to Baldwin V of Flanders (1012-1067) and Adèle of France (1009-1079) and died 13 October 1093 Kassel of unspecified causes. He married Gertrud von Sachsen (1033-1113) . Hugh Capet (c940-996), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Rollo of Normandy (860-932)/s.

Robert was regent of Holland for his step-son Dirk


Offspring of Robert I of Flanders and Gertrud von Sachsen (1033-1113)
Name Birth Death Joined with
Robert II of Flanders (c1065-1111) 1065 5 October 1111 Kassel Clemence de Bourgogne (1078-1129)
Adela of Flanders (?-1115) 1064 April 1115 Canute IV of Denmark (c1043-1086) Canute IV of Denmark (c1043-1086) Roger Borsa (c1060-1111)
Gertrude of Flanders (?-?) 1080 1117 Henri III de Louvain (c1063-1095) Henri III de Louvain (c1063-1095) Dirk II de Lorraine (c1050-1115)
Philip van Loo (aft1065-bef1127) 1065 1127
Ogiva de Messines (c1070-c1117) 1070 1117

Footnotes (including sources)