My mother had a favorite aunt, born in Russia, who was named Eta (EE-tah) or something phonetically similar. When the aunt immigrated to the U.S. as an adult, she became "Edith", thus maintaining the long "E" sound. When I was born, and the aunt was still living, my mother gave me the middle name of Eda (long "e" again). While in school, I hated it and only used the initial "E". As an adult, my "official" signature uses "Eda" and I find it interesting. Have never run into anyone with that name before.