Main
Eustachie de Tonnerre et de Bar-sur-Seine was born 1040 in Tonnerre to Milon V de Tonnerre et de Bar-sur-Seine (995-1047) and Azeka de Woevre (1010-1068) and died 1085 of unspecified causes. She married Gauthier I de Brienne (1045-1090) 1070 JL .
Children
| Name | Birth | Death | Joined with |
| Mantie de Brienne (1065-?) | |||
| Érard I de Brienne (1070-1124) | 1070 | 1124 | Alix de Ramerupt (c1090-c1143) |
| Milon II de Brienne (1075-1126) | 1075 | 1126 | Mathilde de Noyers |
Footnotes (including sources)
| ‡ General |