-Dwarves Deep *is* the source for Dwarves. There will be some more secondary information in Demihuman Deities, for their deities and worship practices, and Underdark, for information about their cities.
(A Tri-Partite Arcanist Who Has Forgotten More Than Most Will Ever Know)
There's not a lot of luck for more gold dwarf clans and last names beyond Dwarves Deep, because practically every other dwarf in Realms products and fiction is a shield dwarf. I have a partially-completed, but still extremely lengthy, list of dwarven names that I need to get to Alaundo, I'll try and do that tonight. Once it's up, it should be of additional help.
Doggedly converting 3e back to what D&D should be... Sigh... And now 4e as well.
Races of Faerūn is another. See also The Wyrmskull Throne and Ed's 'Khōltar' articles from the "Elminster Speaks" series at WotC. Also, Ed's compiled replies here at Candlekeep.