1. A son of Mezentius, who was slain while defending his father against Aeneas. (Virg. Aen. vii. 649, x. 790.) According to the author of the De Orig. Gent. Rom. (15), Lausus fell at a later time, during the siege of Lavinium, by the hand of Ascanius.

2. A son of Numitor and brother of Ilia, was fraudulently killed by Amulius. (Ov. Fast. iv. 55.)