Sobek’s presence can be found all over Egypt, but the two places where His cult was most prominent are Kom Ombo, where He shared a double temple with Heru-Wer, and the Faiyum region in the north near the delta. The delta was also associated with Him, but His cult was particularly represented in the Faiyum.
Shedet, or Crocodopolis, was the biggest city in the Faiyum, and the centre of Sobek’s cult there. It was referred to as The Great Palace. But there were temples all over the Faiyum, and a temple to Sobek and Renenutet in Dja (Medinet Madi). Its fortunes fluctuated over the course of Egyptian history, but had significant attention and rebuilding in the 12th, and 18th Dynasties, as well as in later Greek periods as well.
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.