Question: is avdol a real name?
Answer: For example, in the manga, Jotaro's name is spelled as both Kujo and Cujoh. In case of Avdol, his name is most likely not written as Abdul because of Japanese pronaunciation of it, Avuduru. It sounds like its supposed to be written as Avdol, not Abdul, therefore, most people will pronounce it as Avdol.