Taomat was a Corellian hound from Corellia, the homeworld of the White Worms gang. The thug Syke greatly favored this hound, and wished to unleash Taomat on Rebolt, his competitor, to permanently resolve their rivalry.
The reference book Solo: A Star Wars Story The Official Guide, authored by Pablo Hidalgo, first mentioned Taomat; the book was published in 2018.