Assuming the 'pedia entries are also canon...
1. It's safe to say the Bannor and Clan of Embers are neighbors (Capria, Sheelba, and Rantine entries taken together.)
2. The Bannor, Elohim, Amurites, and Lanun all neighbor the Infernals. This suggests they're all coastal near whatever island the Fane of Lessers is on. (Valledia the Even entry.) This by far is the entry that reveals the most about who neighbors who.
3. Most likely, the Luchiurp are near the Balseraphs. Not necessarily, but it's hard to reason how Beeri's backstory happened otherwise. (Beeri Bawl's entry, plus events in The Momus.)
4. Similarly, the Khazad most likely neighbor the Hippus. (Arturus Thorne's entry, not to mention Against the Wall.)
Good luck if you're trying to puzzle together who is next to who. Might be impossible. Just from this and what's above, Bannor have to have at least five neighbors (Grigori, Infernal, Balseraph, Clan of Embers, and one of the other Infernal neighbors) AND be coastal.