Greetings,
Interesting range of descriptive terms for that tool. When I had our 25kw Onan generator serviced, the "mechanic" (and THAT is a stretch!) used what I know as flare nut wrenches to remove the injectors. He had a different name for them...
Also interesting is Mr. G's reference to a Crescent wrench (post #15) which I know as both an adjustable wrench AND a Crescent wrench. Crescent is the trade name that has stuck for that particular tool probably because Crescent
may have been the first or the most prolific manufacturer of that particular
style of wrench.
Similarly, a generic item such as facial tissue is commonly referred to as Kleenex around here.