I'm really really trying to separate it from the city in Maryland...but I just can't. It's no different than naming a child Baltimore to me.
I don't tend to like the "beth" sound (except in
Elizabeth), but there's always
Bethany,
Bethan, and
Bethania.
Belen is a huge guilty pleasure of mine -- it's the Spanish form of Bethlehem, which is similar to Bethesda.