Well i see you got your answer already! sorry i couldn't respond any sooner, but i guess i was sleeping when you posted!
said about our naming system is correct, i've got my own example to that:
my full name is Petronella Rosina
, this name is on all my bankaccounts, passport and will be on my grave later, but my calling name is Larissa
...if you look good you can see Larissa
out of Petronella
Rosina.....lol. I'm not a Christian
, but Petronella Rosina
is my Grandmother's full name, i'm named after her......
Well guess you got all your questions answered already!