Mabel And Gideons son: 12 year old boy named Josh, has six fingers, secretly gay, reincarnate of Ford

Dipper and Pacifica's daughter: 12 year old girl named Willow, reincarnate of Stan

Wendy's kids: 15 year old twins, a boy named Liam, a girl named Liv, and a 12 year old daughter named Lillian

Soos and Melody's daughter: 7 year old daughter named Daisy, crushes on Josh

Bill's daughter: Girl names Nyra, age unknown but acts like a teenager, can posses multiple people at once