Arma sits next to 4 phonetic neighbors — Alma, Karma, and Arya are the closest matches by sound. Most share Arma's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"weapons, armored one"
"short form of Erasmo/Anselmo"
"Yahweh saves"
"flowering, flourishing"
"affectionate term for a daughter"
"dark-skinned, Moorish"
"my God is an oath"
"love, beauty (via Latin Venus)"
"bow army"
"Sweet and lovely as a peach; endearing and warm-spirited"
"Wonder, miracle, something marvelous"
Similar sound: These names share phonetic patterns with Arma — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Arma.
Rhythm: Arma is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.