Uncle Thor. It has a nice ring to it.
However, since mama Sara was booted outside weeks ago, the kittens being weaned, and her just sitting around starting fights with everyone (namely Thor), Thor has taken them under his "wing". He washes the kittens, plays with the kittens, and acts like a daddy. So we called him Uncle Daddy for a while. But now he's taken things to a whole new and weird level.
Yes, friends, in case you can't tell, that is Uncle Daddy Thor "nursing" the kittens.
Unsuccessfully, I should think, as Thor is a neutered male.
But that doesn't stop any of them. The two littles latch on and suck away and knead, and Thor purrs like a proud mama.
Yep, Uncle Mommydaddy. That's my boy.