Irma sits next to 4 phonetic neighbors — Emma, Alma, and Erma are the closest matches by sound. Most share Irma's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"whole, universal"
"brightness, radiance"
"grace and beauty"
"follower of Saint Francis, Franciscan"
"light, bringer of light"
"favorite, precious one"
"little dragon"
"angels, of the angels, divine messengers"
"lover of horses"
"social gathering, party"
"breath of life"
"crown, jeweled headpiece"
"illustrious, shining"
"resemblance to the divine"
"from the Wylye River"
"of the clan of Bricius"
"Sabine woman"
"pure one"
"angel, divine messenger"
"little warrior, warlike"
"bright + spring"
Similar sound: These names share phonetic patterns with Irma — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Irma.
Rhythm: Irma is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.