Indy sits next to 4 phonetic neighbors — Indie, Andy, and Sandy are the closest matches by sound. Most share Indy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"short for Indiana (land of Indians)"
"from the kaupa (trading) land"
"handsome"
"wise protector from the valley"
"dark as a raven"
"settlement of a sword-bearer"
"creative modern spelling variant"
"God helps"
"bright color, vitality"
"free man, strong man"
"slender, narrow"
"referring to the Cree Indigenous people of North America"
"wolf, wild hunter"
"son of Ty (informal)"
"servant, worshipper of God"
"lord, master"
"son of marsh dwellers"
"of the eighth"
"Moorish, dark-complexioned"
"creative spelling of Rustin"
"pointed mountain, hill"
Similar sound: These names share phonetic patterns with Indy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American origins, giving them the same cultural heritage as Indy.
Rhythm: Indy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.