Pegaseius
Could not find Pegaseo in Logeion dictionaries. Looking for closest alphabetic form.
Pēgasēius, -sēus, s. 1. Pēgasus.
Pēgăsēĭus, Pēgăsēus, a, um, de Pégase : Pegaseium melos Pers. Prol., 14, doux chant des Muses ; Pegaseus gradus Sen. Troad. 385, course rapide, v. Pegasus.