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Hilwidis von Urach und Freiburg was born circa 1190 to Egino IV. von Urach (c1160-1230) and Agnes von Zähringen (c1160-1239) and died 1262 of unspecified causes. She married Frédéric II de Ferrette (c1187-1233) .
Children
| Name | Birth | Death | Joined with |
| Ulrich II de Ferrette (c1210-1275) | 1210 | 1275 Feldbach | Élisabeth de Salins (1210-1277) Agnès de Vergy (1210-c1269) |
| Louis III de Ferrette (?-1236) | |||
| Berthold II de Ferrette (?-1262) | |||
| Adalbert de Ferrette | |||
| Stéphanie de Ferrette (?-aft1235) | |||
| Heilwig de Ferrette (?-1247) | |||
| Anna de Ferrette | |||
| Frédéric de Ferrette (?-aft1245) | |||