I find it pretty boring. And kinda dated to the 70s/80s. It's not bad though, just uninteresting. Personally, I really like
Sam and Sami/Sammy as nicknames. They'd probably be pretty hard to avoid. If you didn't want to use them you might have to have another nickname in mind and I don't see any great options. Mantha? Mana?
Mani? Sama?
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589To peruse my non-name musings:
http://jodifriesen.blogspot.ca/