Fëanorians and their offspring.
Basically fairly random headcanons where Fëanor has nine grandchildren and his line does not die out.
Maedhros and Fingon marry and have baby Ereinion. In this AU, Maedhros does manage to find the twins Eluréd and Elurín, whom he kept under his care; he even baptizes them with names in Quenya.
Maglor adopts (kidnaps) the twins. Following canon, for a change. Although it turns out that Daeron and he fathered a child while they were still married. They divorced after Doriath, so Maglor never knew his husband was in waiting.
After the death of her beloved cousin, Celegorm keeps the only memory of her, baby Maeglin, at her request (Tugorn, who is Turgon?).
After a night of wine without measure, the always neat Caranthir spends hours in bed with Turgon, which results in little Erestor.
Curufin simply disappeared for a year and when he returned he had Telperinquar in his arms.
Amrod and Amras are the uncles who spoil their nephews.
Space is limited, so I did not include the Feanorians' spouses. Husbands, or of course, in this AU they are queer.
These are completely random headcanons that come to mind.
The canon has gone to hell.
