Ivonne sits next to 4 phonetic neighbors — Yvonne, Ivana, and Evonne are the closest matches by sound. Most share Ivonne's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"yew tree"
"heavenly, of the sky"
"star of the sea, beloved"
"most beautiful woman"
"of the Jordan River"
"bright, clear (Clara) + beautiful (Belle)"
"purity, innocence"
"hardworking, industrious (via Millicent)"
"feminine form of Leander (lion man)"
"God with us, divine presence"
"woman from Magdala, tower"
"noble strength"
"heavenly, of the sky"
"bright, clear, luminous"
"she who lives"
"most holy"
"superlative of kallos, beauty"
"dawn"
Similar sound: These names share phonetic patterns with Ivonne — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Ivonne.
Rhythm: Ivonne is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.