In Roman folklore, Mezentius was an Etruscan King and father of Lausus. He was sent into exile becaue of his cruelty, and he moved to Latium. He aided King Turnus against Aeneas and was killed in battle.

Virgil VII, 648; VIII, 482; X 786, 907.

Aeneid or  http://sailor.gutenberg.org/etext95/anide10.txt (Project Gutenberg).