Niles sits next to 5 phonetic neighbors — Miles, Giles, and Lyle are the closest matches by sound. Most share Niles's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"champion, winner"
"completion, eternity"
"heather hill, heath valley"
"powerful, keen warrior"
"truthful, sincere, honorable"
"wagon driver, cart maker (from Old English Wayne)"
"land by the road"
"truly brave, genuinely bold"
"diminutive of Hugh (heart, mind)"
"oarsman, rower"
"God is gracious"
"dark, coal-black"
"creative modern coinage"
"noble friend"
"from Lucania, southern Italy"
"farm on a hill, settlement by a mound"
"legendary warrior (fictional)"
"may God give strength"
"God is gracious"
"clever, astute"
"dweller near the oak trees"
Similar sound: These names share phonetic patterns with Niles — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic Niall origins, giving them the same cultural heritage as Niles.
Rhythm: Niles is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.