too close?

[babyleah15.livejournal.com]

I really like the name Lydia, but I have a daughter named Leah. Do you think they're too similar?  Lydia is kind of Leah with an extra syllable.

Also, for a boy we love the name Samuel, but my husband's cousin just named her son Samuel. It's a pretty common name though, so it wouldn't be like we were stealing a really original idea right? The only thing is that the grandparents would have 2 grandkids with the same name, is that weird? The cousin though is really nice, I don't think she would be mad or anything like that, but I don't want people saying we stole her name. WDYT?