Because xiphias asked...
My mother's name was Sarah Barbara Blatt, but no one ever called her Sarah. She was always Barbara. It happened thuswise: My grandfather really wanted to name his first child after his brother Abe, the eldest of the 12 siblings. But Abe was still alive, and therefore that was forbidden by Jewish custom. They chose the name Sarah, for the biblical Abraham's wife, but were still unsatisfied. So they went to the rabbi, who said it was easily solved. He opened the bible to a random seleection about Abraham and found "Abraham blessed..."; he suggested "barucha" (blessed), since that word came after Abraham! In this way my mother was named "after" Abe without breaking any taboos. Barbara was the nearest English equivalent.
Do they still make rabbis like that?