Yahoel is the name of an angel appearing in the Old Church Slavonic

Old Church Slavonic

Old Church Slavonic or Old Church Slavic was the first literary Slavic language, first developed by the 9th century Byzantine Greek missionaries Saints Cyril and Methodius who were credited with standardizing the language and using it for translating the Bible and other Ancient Greek...

 manuscripts of the Apocalypse of Abraham

Apocalypse of Abraham

The Apocalypse of Abraham is a pseudepigraphic work based on the Old Testament. Probably composed between about 70–150 AD, it is of Jewish origin and is usually considered to be part of the Apocalyptic literature...

, a pseudepigraphical work dating from after the Siege of Jerusalem (70)

Siege of Jerusalem (70)

The Siege of Jerusalem in the year 70 AD was the decisive event of the First Jewish-Roman War. The Roman army, led by the future Emperor Titus, with Tiberius Julius Alexander as his second-in-command, besieged and conquered the city of Jerusalem, which had been occupied by its Jewish defenders in...

. He is an associate of the archangel Michael (Apoc.Abr.10:17) charged to restrain Leviathan

Leviathan

Leviathan , is a sea monster referred to in the Bible. In Demonology, Leviathan is one of the seven princes of Hell and its gatekeeper . The word has become synonymous with any large sea monster or creature...

 and destroy idolaters (10:10-14).

Another later pseudepigraphical rabbinical work ascribed to Ishmael ben Elisha

Ishmael ben Elisha

Rabbi Ishmael or Ishmael ben Elisha was a Tanna of the 1st and 2nd centuries . A Tanna is a rabbinic sage whose views are recorded in the Mishnah.-Disposition:...

, Hebrew 3 Enoch

3 Enoch

3 Enoch is an Old Testament Apocryphal book. 3 Enoch purports to have been written in the 2nd century CE, but its origins can only be traced to the 5th century...

 48d, gives Yahoel as one of the 70 names of Metatron

Metatron

Metatron or Mattatron is the name of an angel in Judaism and some branches of Christian mythology. There are no references to him in the Jewish Tanakh or Christian Scriptures...

, which makes sense in light of the character and role of Yahoel in Apocalypse of Abraham.

In the 13th Century kabbalistic Berith Menucha

Berit Menuchah

Berit Menuchah also Berith Menuha, is a kabbalistic work by rabbi Abraham ben Isaac of Granada.-External links:* at hebrewbooks.org, PDF file...

of Abraham Merimon of Granada

Abraham ben Isaac of Granada

Abraham ben Isaac of Granada also Abraham Merimon was a Kabbalist of the thirteenth century.-Works:Abraham wrote:*A work on the Kabbala, under the title of Sefer ha-Berit. This is quoted by Moses Botarel in the introduction to his commentary on the Sefer Yeẓirah, which passage contains a reference...

 Yahoel is the angel over fire.

Several popular dictionaries of angels, such as Gustav Davidson

Gustav Davidson

Gustav Davidson was a poet, writer, and publisher.Davidson attended Columbia University in New York City and worked for the Library of Congress.-Works:...

 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.