Maria is a Latinate form already of the name Mary.Ester means "star" ...hmm.. the closest I could guess would be "Stella" also meaning "star" in Latin, but I don't know here.Sorry I couldn't be of more help!-Seda*
My Vulgate Bible simply transliterates the name Esther as Esther. They don't tend to mess with some foreign names, though her Hebrew name, Hadassah, is Latinized as Edissa.