
swim
The CB model series goes back at least to 1969, and the Nighthawk name started showing up on CB models in the early 1980's. My bike has "
Nighthawk" spelled right out on the sidecovers, and I
think every US model Nighthawk was blatantly labeled like this.
I think the modern Euro CB750 has "SevenFifty" on the side covers, so I see how the question arises. At the very least they share a bloodline. The 599 and 919 had liquid-cooled CBR engines, so they were mere spiritual heirs.
Hard to label something until it stops changing. In America, that's easy as the model is no longer sold.