Anyone know who Jazz singer Ella Fitzgerald’s younger Danish boyfriend in early 1960s Copenhagen was?

This is a looong shot question, but I’m guessing he’s be in his 80s by now, if he’s still alive. I’m doing some research on her, about the few years when she had a home in Copenhagen, and was with a young Danish guy who people said was “half her age and half her weight.” But no historians seem to know who the guy was, as she was very private about her personal life.

I’d love to talk with him, if he’s alive and up for it. If any older jazzheads (or kids or grandkids of old jazzheads) are here and have any leads/tips, I’ll be forever grateful!