Iza sits next to 4 phonetic neighbors — Isa, Elsa, and Izzy are the closest matches by sound. Most share Iza's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my God is an oath"
"shining, radiant"
"pledged to God"
"precious gem"
"God has healed"
"good, honorable, noble"
"miracle"
"birthday of the Lord"
"glorious ruler, strong leader"
"gift of Zeus, power of Zeus"
"voice, divine call"
"grace, subtlety"
"light-bringer (diminutive of Lucia)"
Similar sound: These names share phonetic patterns with Iza — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Iza.
Rhythm: Iza is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.