Gellert Grindelwald

Amy Fallen Grindelwald nee Raven

Tom Marvolo Riddle
(Lucifer Horcrux Grindelwald)

Persephone Hell Riddle(Grindelwald) nee Lady

Harry James Potter
(Arden Tyrant Grindelwald)

Salazar Slytherin is the only son of Merlin Emrys.