Isidore sits next to 4 phonetic neighbors — Isadora, Theodore, and Salvador are the closest matches by sound. Most share Isidore's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of Isis"
"fortunate, blissful"
"my God is Yahweh"
"God, divine"
"he will enlighten"
"God has shown favor"
"handsome, beautiful youth"
"strong, courageous (from amatz)"
"YHWH is salvation, God saves"
"lamp of God"
"remembered by God"
"dragon, serpent"
"Yahweh has saved"
"gift of God"
"water meadow"
"name of God"
"whole power, universal ruler"
"kings, monarchs"
"one of the Franks (a Germanic tribe)"
Similar sound: These names share phonetic patterns with Isidore — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Isidore.
Rhythm: Isidore is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.