Family/Spouse: Brienne, Gautier De. [Group Sheet] [Family Chart]
Eustachia married Sancerre, Count William De about 1188. [Group Sheet] [Family Chart]
Eustachia married Champlitte, Prince of Achaia Guillaume I De in 1200. [Group Sheet] [Family Chart]
Eustachia married Sancerre, Guillaume I Comte De about 1211. [Group Sheet] [Family Chart]