From Unofficial Ansalon Wiki
The various Clans of Ansalon and pages relating to them.
Clan Leaders are shown in the "who" list with a <L> before their name. Clan Recruiters are shown with a <R>.
Players are permitted only ONE character in Leadership/Recruiting positions in clans. That means you have a WR recruiter? No other characters of yours have R or L. This is due to having an RP focus.
Some clans are automatic. Kender will automatically go on Wanderlust, Dwarves are part of the 7 Kingdoms, Goblins/Hobgoblins/Ogres are automatically Maruader etc (all when they hit level 15).