Grace Slick of "Jefferson Airplane" (then "Jefferson Starship"
) had a girl whose name changed to whatever the girl wanted. She named herself Tree for a bit, then went on to other things. Last I read she was named "America."
Frank Zappa has to be the king of this kind of cruel self-indulgence, naming his kids Moon Unit, Dweezil, Ahmet Rodan, and Diva.
George Forman named all of his sons after him (George Jr., George III, George IV, George V and George VI), but at least those are normal names.