A cool blog by DSP.
Elder Nyon was the former empress, and caught Love Sickness but left the island.
So, the question is who could have done the same thing as Luffy?
Could it have been Roger? Im guessing he would've ignored her like Luffy and fallen in love with Rouge.
What about Dragon? Could open up a new "Luffys mother" theory.
But wait, Nyon was seen to have known Rayleigh before. I'm guessing its probably Rayleigh, but he chose Shakky over Nyon.
Whitebeard is a real ladies man, with his beautiful nurses.
Garp could've had a thing with her, with his charming beard.
She could've loved Shikki, but I'm guessing he likes younger girls..