Here are pages that contain multiple brands that I have little or no information on apart from a name and some evidence that they at some point made Ukuleles
Some Definitions of Terms used:
Brand means the name seen on the headstock, sound hole label or any advertising
Firms can be Manufacturers, Importers or Distributors. ~ Luthiers are Individuals or a just a couple of people
Pre War is before 1945 ~ Post War is 1946-1990 ~ 21st C. is 1990 on ~ 20th C. covers all periods but there is a definite ending