The Quebec law allows a new born to take either his(her) father's name or the mother's name or both names. In this case he could take his father's name and the 'A' problem won't exist. Actually in Bulgaria the children take their fathers' family names. If you absolutely want to have your son with your family name, you can request a name change after the birth certificate is issued but you need to pay certain fees. I understand from a Bulgarian point of view that it is going to be difficult for a boy to have a female family name but there are solutions to this (as just explained) and changing or bypassing the law for a particular case is not necessarly right. Imagine if all cultural communities requested changes because in their countries the rules differ from the Quebec and the Canada law...

#10: -

Above is correct. As per http://www.educaloi.qc.ca/en/capsules/registering-birth-child

The child can adopt the father's family name, the mother's family name, or a composite of the two names joined by a hyphen.

The family names of the mother or father must be written in full so that the child's family name fully reflects the family relationship either to the mother, father or both.

The problem here as I see it is that the Quebec bureaucrats do not understand that "A" in the feminine family name is just a SUFFIX. And now such suffix exist in masculin family names.