we have all kinds of different names for our kids
(cooper is sometimes called coop,, or buddy or bud). isabella grace was supposed to be called bella grace. but she is called just bella for the most part. i figure as long as i and they have these family members in our/their lives we are blessed and lucky. and i could care less what they call them . as long as they are treating them with respect and kindness and love them. there are so many people in the world who don't have family, or family that is calling them things like idiot, stupid, a$$hole, B!tch, Ba$____@____.com, etc.
maybe this is where your other family members are coming from and don't see your point. i can see both sides,, but you have to ask yourself , is it worth it? are you willing to 'die' on that mountain top? pick your battles. makes less stress for you in the long run don't you think?
good luck.. and if you do decide to pick that as a battle you feel you have to fight,, remember, what goes around comes around. i've been on both sides... can be pretty humbling when it comes back around.