no, Hawaiian pizza was not Hawaiian: It was invented in Canada by a Greek immigrant.
From the BBC:
They were then owners of the Satellite Restaurant in Chatham, a southwestern Ontario town about 290km (180 miles) from Toronto and 80km from Detroit.
"We just put it on, just for the fun of it, see how it was going to taste," Panopoulos told the BBC. "We were young in the business and we were doing a lot of experiments."
Customers ended up loving the savoury sweetness of the dish. The creation also capitalised on the mid-century tiki trend, which popularised Polynesian culture in North America.and the recipe on how to make it can be found HERE