Hmm I guess there's no way to know what inspired the story of Hawkman and Hawkgirl ( did not know about them, thank you for that), but it's possible. As you said, it's the ultimate story and fantasy of all lovers. I also wanted to point out that in Adam and Eve also, the characters are doomed to never be happy, never able to be together and usually one dying for the other before they can consume their love.

Thank you for taking the time to read and comment! DOubt it's a coincidence, by the way ;)