Names and surnames

I have been named after two uncles, one on my mother's side (Paul) and one on my father's side (Etienne), who both died young.
Up to the second World War and even afterwards, family names were almost never used.
I thus am Paul van Margriet van Cis van de Kloefkapper, or : Paul van Margriet van Marie van Schouppens ; and also Paul van Petrus van Pieje uit 't Schalkom ; and (probably) Paul van Petrus van Margriet van Champetters.
I remember that my mother used other names still, but I have forgotten those ... I think one was : Paul van Margriet van Marie van Fernantes.