Iris sits next to 3 phonetic neighbors — Ida, Lyris, and Isis are the closest matches by sound. Most share Iris's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rainbow"
"sun ray, bright light"
"son of Colin, victory of the people"
"faithful wife"
"ardor, enthusiasm, fire"
"son of Adam"
"father's joy"
"God has answered me"
"night; dark beauty"
"flower name"
"treeless plain, open grassland"
"torch, bright flame"
"strong woman"
"illusion, magic"
"short form of names ending in -lia"
"intoxicating one, mead-like"
"sea of bitterness"
"movement, to shake"
"from Magdala, woman of the tower"
"precious, dear one"
Similar sound: These names share phonetic patterns with Iris — 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 Iris.
Rhythm: Iris is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.