Isma sits next to 3 phonetic neighbors — Ismay, Isma, and Izma are the closest matches by sound. Most share Isma's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"safeguarded, protected by God"
"creative modern variant of Anne/Annie"
"fortress of battle"
"peaceful ruler or eternal ruler (from Erika/Rika)"
"dark, from the Adriatic"
"God is gracious"
"veena; musical lute instrument"
"divine judgment"
Similar sound: These names share phonetic patterns with Isma — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Isma.
Rhythm: Isma is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.