My brother is a dad now

I received a phone call early this morning. The subject of which was something I had known was going to happen eventually, but it was still a pleasant thing to hear. I was busy at the moment my brother called, but he left a message, which had probably the best way of phrasing what happened that I’ve ever heard. “A little person fell out of my wife last night, and you have a niece now.”

What do you call yourself if you’re already an uncle to boys, and now you have a niece? Is there a different word for it? Am I a double-uncle now? Am I a quadruple uncle, since I’ve got four niblings? And of course the big question coming from my parents is how long until I become a father myself. I mean I need to become a husband first, but you know… eventually, that’s the plan.