Geronimo sits next to 3 phonetic neighbors — Jerome, Hieronymus, and Geroni are the closest matches by sound. Most share Geronimo's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sacred name"
"spirit of battle"
"bear"
"flowing river"
"son of Matthew"
"eighth"
"gift of Isis"
"river of the wolf, valley river"
"God has shown favor"
"settlement of Leaxa's people"
"from the wealthy estate, prosperous settlement"
"settlement of Brice"
"beautiful; fair"
"strength, honor"
"lord, my lord"
"strong fighter (from bar + hard)"
"God has remembered"
"strong, healthy"
Similar sound: These names share phonetic patterns with Geronimo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Geronimo.
Rhythm: Geronimo is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.