One might reasonably ask why Erdélyi's father had the family name Diamant and not Erdélyi. Well Arthur Erdélyi was indeed named Arthur Diamant, but his father died when he was young and his mother remarried.
Isang makatuwirang maaring magtanong kung bakit Erdélyi ng ama ay ang pangalan na Diamant pamilya at hindi Erdélyi. Mabuti Arthur Erdélyi ay katunayan na pinangalanang Arthur Diamant, ngunit namatay ang kanyang ama kapag siya ay bata at kanyang ina remarried.