Sirius couldn't help but chuckle as he shrugged. "Sorry mate, your family is far too large for me to remember everyone in it just yet - give me a little time and I'll have you all down, but right now it's mostly just knowing that redheads are related." He grinned though, because he really did want to get to know the family Harry had created for himself - the people who loved and cared about him, and of course those who loved and cared about James - there were just a lot of them.
"I think right now, I can manage Harry's immediate family names - and then of course there is Molly and Arthur, and Gideon, and the rest..." He trailed off with another shrug. "I'm working on it though." He assured the man with a grin.
Sirius wasn't completely stupid, he caught the implication of what the man said - Jamie's godfather, but if that was what he wanted to talk about then he could certainly well bring it up on his own.