I've got to side with most commenters, I mean, in all the other ones you've included the extended family. This one you are missing #17 which is #18's blood brother. You mentioned Gero, but he's just the guy who turned them into cyborgs, not a family member. #17 and #18 were blood related, twin brothers, Lapis and Lazuli, before being turned into cyborgs.
No creo que Gero cuente como familia, 18 antes de ser 18 era una persona real, no es que el Doc la creara de la nada. Por otro lado, #17 si es su hermano biologico, y cuñado de Krilin. Y felicitaciones por aparecer en Kotaku, jajaja.