Guy married Mahaut (Maud) Princess Brabant on 16 Jan 1255 in , Neapel. Mahaut (daughter of Henri Ii Duke Brabant and Maria Princess Of Germany, [DUCHESS OF BRAB) was born about 1224 in Of, , Brabant, France; died on 29 Sep 1288; was buried in Cercamp Abbey, Artois, , France. [Group Sheet] [Family Chart]