Gaius Julius Hyginus
The Crommyonian Sow was a wild pig that ravaged the region around the village of Crommyon between Megara and Corinth, and was eventually slain by Theseus in his early adventures. According to the "Bibliotheca" of Pseudo-Apollodorus, it was said by some to be the daughter of Echidna and Typhon, and was named after the old woman who raised it. According to Strabo, the sow was said to be the mother of the Calydonian Boar. Gaius Julius Hyginus says that the pig Theseus killed at Crommyon was a boar.