I don't think it's wierd at all.
I had the same problem in the story I'm writing except it's even more similar--Sam and Samewell.
I ended up changing Sam's name and I kind of regret it because I still see him as a Sam even though his name is now Riley; whenever I think or talk about him I find myself constantly correcting myself...
So what I'm trying to say is it's wonderful and I love the names, plus they aren't as similar as mine. I would change it back but it would be too wierd and Sam is against Samewell's son and I don't think it would work, but your two are good the way they are.
Sorry, I'm rambling on but I had to talk myself through this
