Also Black, White, Green, Brown, for smiths working with iron, tin, copper, or bronze (https://www.surnamedb.com/Surname/Smyth https://www.surnamedb.com/Surname

Also Black, White, Green, Brown, for smiths working with iron, tin, copper, or bronze (https://www.surnamedb.com/Surname/Smyth https://www.surnamedb.com/Surname/Smyth, https://www.reddit.com/r/AskHistorians/comments/9nwm60/why_have_certain_colors_become_popular_last_names/ https://www.reddit.com/r/AskHistorians/comments/9nwm60/why_h...). Those names seem to have multiple origins, but the metal connection explains why most other colours don't have an associated surname.