Harry and Ginny's kids:
James Potter: Gryffindor
Albus Potter: Slytherin
Lily Potter: Ravenclaw

Ron and Hermione's kids:
Rose Weasley: Ravenclaw
Hugo Weasley: Hufflepuff

Fluer and Bill's kids:
Victoire Weasley: Ravenclaw
Dominique Weasley: Gryffindor
Louis Weasley: Gryffindor

Remus and Tonks' kid:
Teddy Lupin: Hufflepuff

Percy and Audrey's kids:
Molly Weasley: Ravenclaw
Lucy Weasley: Hufflepuff

Alicia and George's kids:
Fred Weasley: Gryffindor
Roxanne Weasley: Slytherin

Luna and Rolf's kids:
Lorcan Scalmander: Ravenclaw
Lysander Scalmander: Slytherin

Astoria and Draco's kids:
Scorpius Malfoy: Slytherin
OC- Cassio Malfoy: Hufflepuff

OC

Hannah and Neville's kids:
Alice Longbottom: Ravenclaw
Frank Longbottom: Slytherin

Oliver and Katie's kids:
Opal Wood: Hufflepuff
Edward Wood: Slytherin
Casper Wood: Gryffindor

Cho and Dudley's kids:
Cedric Chang: Ravenclaw
Remus Chang: Hufflepuff