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"
"clear, tinkling sound"
"God strengthens"
"yellow, slender"
"strength, honor"
"man, mankind, mortal"
"slender, narrow"
"building material, beam"
"one who defies authority, resister"
"creative modern coinage"
"my judge"
"strength of God"
"belonging to Mars"
"rain, precipitation"
"short form of Walter"
"diamond"
"supplanter"
"new house"
"bright, brilliant"
"uncertain; possibly Romani personal name with regional meaning"
"he is Yah (God)"
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.