Wonnie sits next to 5 phonetic neighbors — Winnie, Bonnie, and Connie are the closest matches by sound. Most share Wonnie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blessed, fair, white"
"whole, universal"
"little rock, wise protector"
"Beautiful"
"black drink crier, one who shouts at the sacred ceremony"
"joyful spirit"
"satiated city, fertile place"
"bold in counsel"
"old, wise elder"
"modern invented name, possibly related to traveler"
"queen"
"linden tree valley"
"mistress, lady of the house"
Similar sound: These names share phonetic patterns with Wonnie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh via Winifred origins, giving them the same cultural heritage as Wonnie.
Rhythm: Wonnie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.