Isabella sits next to 4 phonetic neighbors — Arabella, Isabella (girl), and Isabeau are the closest matches by sound. Most share Isabella's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledged to God"
"initials: various combinations (Andrew Charles, Anthony Cole, etc.)"
"one who farms the land"
"beloved, dearly loved"
"birch meadow"
"weapon, mace bearer"
"Dealer in cloth and fabrics, cloth merchant"
"divinely favored"
Similar sound: These names share phonetic patterns with Isabella — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Isabella.
Rhythm: Isabella is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.