I know it's so old-school, but I love Miriam. I find it so pretty and simple. Pretty without being frilly. I like Miri as a nickname.
Since Miriam shows up in so many cultures and languages, I don't think it's too Hebrew/Jewish at all.
My favorites from you pnl:
Miriam Adalia
Miriam Gabrielle
Miriam Sariah
Miriam Talitha