Isabeau is the French Middle Ages version of
Isabelle. It is not the male version. Names ending in "o" for women were very fashionables a that time:
Mahaut, Brunehaut (French form of
Brunhild)...
~~ Claire ~~
My ! are Alia, Eidel, Enola, Israel, Dudel, Yuri, Lina, Lorelei, Leilani, Owen, Julian, Glorinda, Mirinda
My ? are Hillel, Meshullam, Johnny, Ginny, Cordelia, Fiammetta, Yocheved
My ~ are Tehila, Tilda, Hailey, Gillian, Huldah
My / are Aglaia and July