So, does he have nieces and nephews?
It would be unsurprising if he did not have much to do with them, having had little to do with his siblings, who were away at boarding school before he could even remember them. (Or would they go to boarding school? Hmmm -- apprenticed, maybe.)
I wonder if they envy him being shunted off to the professional life, as a wizard. Or even think of him as the spoiled pet of the family.