KME was named after it's founder Jim Kovatch (Kovatch Mobile Equipment) and Pierce is also named after it's founder (whose name escapes me). Pierce started off making regular cars (the Pierce Arrow) and than eventually switched to fire apparatus. It isn't on your list but Hamerly was named after it's founder, when Les Hamerly decide to leave Hahn Motor Company he formed Hamerly Custom Productions and started making his own designs. HME stands for Hendrickson Motor Equipment (yes, the same Hendrickson that built the square cabs) and yes it was named after it's founder.
David Fritz
David Fritz