Another category of sets are called "Calvert" after the maker, like in the 2nd set here.
Signed sets do exist as well, like this example fom the Jon Crumiller collection, which is actually a St.George type, but with the very typical top of the King and the beautiful Knight as only Calvert made it.
England, by (most likely) Jaques, "Calvert", ca. 1840
England, by Calvert, 18th-19th century