[Beanamir of Gondor]

My first guess was Thingol, but I don't have a real reason and it feels stupid.

I keep going back to the relationships between fathers, particularly because Elendil and Gil-Galad died in battle together. Perhaps something to do with Hurin, though I'm not sure what? But then Hurin outlived Turin... and Elendil died before Isildur.
I also keep getting the images of the broken Anduril and Gurthang, though they were broken in different ways, and Gurthang was actually Turin's...