That means there were a dozen Hemis in the 1950s with no crossover among the brands. Let's jump all the way to this most recent generation of the Hemi engine, where they actually just were called ...
The Chrysler HEMI is a very special engine. The first Chrysler HEMI arrived ... HEMI was celebrated amongst gearheads in the 1950s, it was really the second generation HEMI, introduced in 1964 ...