My mom sent me some pictures of my dad as a baby so that I could compare their looks—and they do certainly look to be related, don't they? Alexander's face is a little rounder, but their eyes and noses (and even their smiles) are very similar, I think.
Here they are sitting up:
And here they are lying on their tummies:
And here's a picture of them enjoying a snuggle together (from a couple of weeks ago, I think):
For whatever reason my dad has stopped smiling with his mouth wide open and his tongue wagging. Weird. Why is it that that is only an acceptable way for babies to show joy while adults have to be all full of decorum and stuff?