Behind the Name is such a wonderful site! The single best name site online in my opinion. I've used it tons of times already xD
I'll have to check out LDAT.

TOLKIEN?? Really? :') Love it and I haven't even looked yet! *Clicks link*

Fenn, I know a site that translates human names to Elvish - with the meaning included! You can switch the links for boys and girls: http://www.arwen-undomiel.com/elvish/boynames.html