The Baba Sali’s rebbetzin was Simcha.
Also Rav Simcha of Dessau, one of the meforshim in the back of the Vilna Shas.
And if you have trouble wrapping your mind around Simcha being a Male name, how about Chaviva? It’s the name of an Amora……
We find the great Rebbe Rav Simcha Bunim of Pshischa.
It’s רב חביבא. And an alef at the end of a word on Aramaic is masculine. Anyway, Simcha for a male still makes us giggle.
If a father or brother is named Yehuda, can a newborn girl be named Yehudis?
In the Yerushalmi (beginning of Megillah) it’s רב חביבה
Todays Daf. (Rebbe) Ayalah
Apushatayid – as YO pointed out, that is spelled with a final alef, meaning it is not feminine. Moreover, the Meleches Shlomo says it (maybe) should be pronounced Ayla (with a Schwa under the Yud)