Tweeling
"Njord is de echtgenoot van de reuzin Skaði en vader van Yngvi-Freyr en Freyja. Volgens de Heimskringla was hun moeder Njords eigen zuster."
"Njörðr, father of the deities Freyr and Freyja by his unnamed sister, was in an ill-fated marriage with the goddess Skaði"
https://en.wikipedia.org/wiki/Nj%C3%B6r%C3%B0r
Mogelijk is zijn moeder Nerthus, Nerþuz
"associated with sacral kingship, fertility, peace, prosperity, and virility, with sunshine and fair weather, and with good harvest"
He has/had a relationship with Gerðr Gymisdotter.
The relationship started
Child(ren):
Ook Frey, Frø, Fricco Froði, Yngvi-Freyr