Yahoel (Hebrew יהואל, also spelled Jehoel in some English texts, and Yaoel in French sources) is the name of an angel appearing in the Old Church Slavonic manuscripts of theApocalypse of Abraham, a pseudepigraphical work dating from after the Siege of Jerusalem (70). He is an associate of the archangel Michael (Apoc.Abr.10:17) charged to restrainLeviathan and destroy idolaters (10:10-14).
Another later pseudepigraphical rabbinical work ascribed to Ishmael ben Elisha, Hebrew 3 Enoch 48d, gives Yahoel as one of the 70 names of Metatron, which makes sense in light of the character and role of Yahoel in Apocalypse of Abraham.
Several popular dictionaries of angels, such as Gustav Davidson A dictionary of angels: including the fallen angels (1967) repeat the claim that Jehoel was (in unidentified Jewish texts) the chief angel of the Seraphim. No source for this claim is forthcoming.