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Ermentrude Ivrea de Bourgogne was born 1055 to Guillaume I de Bourgogne (1020-1087) and Stephanie de Longwy (c1035-aft1087) and died after 8 March 1105 of unspecified causes. She married Thierry de Montbéliard (1045-1105) .
Children
| Name | Birth | Death | Joined with |
| Thierry II de Montbéliard (1081-1163) | 1081 | 1163 | |
| Louis de Montbéliard (?-1103) | |||
| Frédéric I de Ferrette (c1087-1160) | 1087 | 1160 | Petrissa von Zähringen (c1095-c1115) Stéphanie de Vaudemont (c1091-c1174) |
| Renaud I de Bar (1090-1150) | 1080 | 10 March 1150 Mediterranean Sea | NN Gisèle de Vaudémont (1090-1141) |
| Étienne de Montbéliard (?-1162) | |||
| Guillaume de Montbéliard (?-bef1105) | |||
| Hugues de Montbéliard (?-aft1105) | |||
| Gunthilde de Montbéliard (?-1131) | |||
| Agnès de Montbéliard (c1085-1176) | 1085 | 1176 | Hermann II. von Salm (c1075-1136) |