Odin rides to Hel, W. G. Collingwood, after the Poetic Edda.
Key myth
Seeing the giantess Gerðr from Odin's seat, Freyr fell ill with longing. His servant Skírnir won her for him, and Freyr gave away his sword, which is why he will be weaponless at Ragnarök.
Deities in other traditions who share a theme with Freyr: earth, harvest and fertility, sky, storm and thunder, love, desire and fertility. This is overlap in one area only.