Jeronimo sits next to 4 phonetic neighbors — Geronimo, Hieronymus, and Girolamo are the closest matches by sound. Most share Jeronimo's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sacred name"
"dweller in the woods"
"gift of Yahweh"
"defender of men"
"nobleman, member of the patrician class"
"the god of love"
"from Rome, Roman pilgrim"
"famous ruler"
"one who helps or aids"
"crown, wreath of victory"
"from the Fabius family, Roman patrician"
"divine strength"
"gentle, lenient"
"courteous, polite"
"crown, wreath"
"brave voyage, daring journey"
"God has made, made by God"
"of the eighth"
"melodious, pertaining to song"
"steadfast, permanent"
Similar sound: These names share phonetic patterns with Jeronimo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek origins, giving them the same cultural heritage as Jeronimo.
Rhythm: Jeronimo is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.