In Greek mythology, Leonteus son of Coronus (and grandson of Caeneus) is a Lapith commander in the Trojan War. With Polypoetes son of Pirithous he leads forty ships from Argissa, Gyrtone, Orthe, Elone, and Oloosson, and Homer credits him with several kills in the assault on the Achaean wall. Distinct from other Leonteis (Ixion's father in one source, a Theban defender in Statius, or Andraemon's brother).
Adapted from Wikipedia, "Leonteus (mythology)" · CC BY-SA 4.0
I.Lapith at Troy
Homer's Catalogue of Ships pairs Leonteus, son of Coronus son of Caeneus, with Polypoetes as leaders of the Lapith contingent from Thessalian towns. Hyginus and later mythographers keep Cleobule as his mother in some stemmata and call him a scion of Ares' line through the Lapith house.
In the fight at the wall he is named among the defenders who throw back the Trojans; traditional kill-lists credit him with Antiphates, Hippomachus, Iamenus, Menon, and Orestes.
II.Homonyms
Wikipedia's Leonteus (mythology) page also lists a father of Ixion, a brother of Andraemon who marries Amphinome daughter of Pelias, and a Theban defender slain by Hippomedon in Statius' Thebaid.
The atlas id leonteus-lapith is the Homeric Lapith co-captain — not those minor namesakes.