Gerard I de Lange, de Rossige, Count of Guelders was born after 1055 in Wassenberg to Gerard III van Wassenberg (c1030-1058) and died after 1134 of unspecified causes. He married Clémence of Aquitaine (1060-1142) .
Children
| Name | Birth | Death | Joined with |
| Yolanda van Gelre (?-1131) | 1085 Wassenberg, Germany | 1131 | Baldwin III de Hainaut (-1120) |
| Adelheid van Gelre (c1080-1156) | 1080 | 1156 | Ekbert I. von Tecklenburg (c1090-1150) |
| Gerard II van Gelre (c1098-c1131) | Ermgard van Zutphen (-1138) | ||
| Judith van Gelre (?-1151) | 1151 | Walram II van Limburg (?-1139) | |
Footnotes (including sources)
| ‡ General |
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