Princedom can't buy me love

[Voralphion]

Or what about the children of Orodreth, son of Angrod Gil-galad and Finduilas?

In the Silmarillion it says that Orodreth was the brother of Finrod Felegund and hence the son of Finarfin and the son of Angrod.
It also says that Gil Galad was the son of Fingon which is why he became high king of the Noldor after Turgon. So Fingon must have been married as the Eldar generally didn't have illegitimate children.