Netherese for the common rabble and Loross for the high muckety mucks, after double checking there was no "Shadowfell" specific language that might have gotten grafted in later.
If we're talking post-Spellplague Realms, the top 5 houses are: 1. Baenre 2. Barrison Del’Armgo 3. Xorlarrin 4. <font color="orange">HAMSTER</font> Tlabbar 5. Mizzrym Of course, about the only constant since 2E AD&D is "Baenre runs things"
Officially and the ones that count: The Old Mage, Stinkbeard, Old Sage, Doombringer of Mystra. (Unofficially, the ones I've heard the most are "Ed Greenwood's Self-insert persona" and "That amazingly dirty old man." )