Initially there were only craftsmen, merchant and market (or something like that). Then I've found a link to that RPG book I cited and borrowed some section names from there (e.g. Patriciate) for the sake of variety. I can't find it now and I only have that piece of text because I answered the same question before :) It was some non-dnd book (or a excerpt from a book) about medieval city life. Actually I'm planning to rework this ward system and maybe I'll even remove them completely - multiple "craftsmen" placed side by side don't make much sense on a map.