Names 2 and 3 are just bizarre to this non-American.
That was the best name they could come up with?.
Yes, well, there are just some Americanisms that can’t be fully explained by anything other than experience and usage. If it makes you feel any better - and it probably won’t - when we lived in Central Europe we had friends who were originally from Belfast, though at the time were Londoners. There were a few expressions they had that never quite connected for me.