In Greek mythology, Aesepus (Ancient Greek Αἴσηπος) may name either the river-god son of Oceanus and Tethys who personifies the Troad river Aesepus, or — as in this atlas node — the Trojan warrior son of the naiad Abarbarea and Bucolion, twin of Pedasus, slain by Euryalus in Iliad 6.
Adapted from Wikipedia, "Aesepus" · CC BY-SA 4.0
I.Trojan twin of Pedasus
Homer's Aesepus and Pedasus are twins whom Abarbarea bore to Bucolion, Laomedon's illegitimate eldest son, while he shepherded. Mecisteus' son Euryalus strips their harness after killing Dresus and Opheltius — a brief Catalogue-of-the-slain vignette.
A separate Hesiodic Aesepus is the Oceanid river-god; some genealogies even make the nymph Abarbarea that river-god's daughter. The atlas id aesepus-trojan is the warrior twin alone, not the river personification.