masc. proper name, from French Jérome, from Late Latin Hieronymus, from Greek Hieronymos, literally "holy name," from hieros "holy" (see ire) + onyma, dialectal form of onoma "name" (from PIE root *no-men- "name").
c. 1300, from Old French ire "anger, wrath, violence" (11c.), from Latin ira "anger, wrath, rage, passion," from PIE root *eis- (1), forming various words denoting passion (source also of Greek hieros "filled with the divine, holy," oistros "gadfly," originally "thing causing madness;" Sanskrit esati "drives on," yasati "boils;" Avestan aesma "anger;" Lithuanian aistra "violent passion").
Old English irre in a similar sense is unrelated; it is from an adjective irre "wandering, straying, angry," which is cognate with Old Saxon irri "angry," Old High German irri "wandering, deranged," also "angry;" Gothic airzeis "astray," and Latin errare "wander, go astray, angry" (see err (v.)).
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit nama; Avestan nama; Greek onoma, onyma; Latin nomen; Old Church Slavonic ime, genitive imene; Russian imya; Old Irish ainm; Old Welsh anu "name;" Old English nama, noma, Old High German namo, Old Norse nafn, Gothic namo "name."
<a href="https://www.etymonline.com/word/Jerome">Etymology of Jerome by etymonline</a>
Harper, D. (n.d.). Etymology of Jerome. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Jerome