
1) DC Comics supervillain 2) Egyptian god 3) Fictional murderer 4) Sea and river god
Found on
https://www.crosswordclues.com/clue/sobek

Sobek (also called Sebek, Sochet, Sobk, and Sobki), in Greek, Suchos (Σοῦχος) and from Latin Suchus, was an ancient Egyptian deity with a complex and fluid nature. He is associated with the Nile crocodile and is either represented in its form or as a human with a crocodile head. Sobek was also associated with pharaonic power, fertility, and...
Found on
http://en.wikipedia.org/wiki/Sobek

In Egyptian mythology, a crocodile god worshipped throughout Egypt but especially in El Faiyûm, and with Horus at Kom Ombo. ...
Found on
http://www.encyclo.co.uk/local/20688

the ancient Egyptian god of crocodiles, Horus the Elder enlisted the help of Sobek to kill his uncle Seth; Sobek helped Horus on another occasion when he rescued Horus` four sons from the waters of Nun; Sobek was depicted as a crocodile or as a man with the head of a crocodile.
Found on
https://www.encyclo.co.uk/local/10135

A crocodile-headed god. Admired and feared for his ferocity. At the command of Ra, He performed tasks such as catching with a net the four sons of Horus as they emerged from the waters in a lotus bloom.
Found on
https://www.encyclo.co.uk/local/10138
No exact match found.