In Julie of the Wolves, Miyax's family is small, to say the least. Not counting strict Aunt Martha, it's really just the father-daughter pair of Miyax and Kapugen that makes up the central family of the book. That is, until the wolves enter the picture. Soon they, too, become a part of Miyax's family. She gets an adopted father in Amaroq, and an adopted brother in Kapu. But of course having a wolf for a sibling doesn't fit into any kind of traditional notion of family that we know of. But maybe that's just it. Maybe Miyax's experiences are meant to teach us that families are found in the unlikeliest of places.
Miyax's time with the wolves is meant to show us that families are made, not inherited. Amaroq is more of a father to her than Kapugen ever was or will be.
Miyax's true family was the wolf pack, and unfortunately this means she can never find a real sense of family among humans.