Hakatan: Are you for real? Taking random L”K or even Aramaic words used in learning is just as logical as naming after a chosheve ancestor that had a Yiddish name? Please, you may not be infatuated with Yiddish names but you’re taking this a tad too far, IMHO.
And Oomis, we don’t know the original for many Yiddish names. Also, boys’ names are usually given in L” K or in a combination with its Yiddish counterpart, while girls’ Yiddish names usually stand on their own. So Tzvi Hersh was likely named at his Bris as Tzvi, or perhaps Tzvi Hersh; while Feiga was probably named just that. I don’t know why this is so. Many frum people don’t want to change the name of the one after who they are naming a child.