Sobek has a very small family, relative to other gods in the pantheon, I think. The only family – aside from consorts – Sobek has is Nit, His mother. This is the most common family given to Him. Whatever else He is, He is always son of Nit. You don’t really get one without the other.
His father is occasionally named as Set, or the more vague and unidentifable ‘Senwy’ (the two brothers) but more often his father is not mentioned. My own UPG from Nit is that She Herself is both father and mother to Sobek, that She did not need a father for Him to bring Sobek into the world.