What other names of riding mowers are under the simplicity name?

I do not know of any names that under the Simplicitity name. They did for a time manufactur the Allis Chalmers machines, though the Allis' had their own transmissions and sheet metal. I think allis made a garden tractor for them that was described as "cream and red" that was an "odd ball" in the late 1970's or early 1980's that used all different belts. The brand is now owned by Briggs.