Andreas Rak

I am trying to get information on Andreas (Andrew Rock) Rak he was born in 1879father’s name was Joseph Rock (Rak) and lived in Czech. and later Lacarak which is now not far from Budapest. I need to know who his mother was I have been told her name was Catherine and some say Elizabeth, no maiden name. Was Elizabeth a step mother?? any help would be great thanks for your time.Jeanann