Edwina sits next to 3 phonetic neighbors — Edwyna, Edwena, and Edwine are the closest matches by sound. Most share Edwina's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"prosperous friend"
"bright like a bear"
"from Clare, the bright place"
"blooming, fresh, green"
"luminous, shining (via Lucinda)"
"of the Claudian family"
"from Lydia (ancient region of Asia Minor)"
"star"
"meadow on a ledge"
"battle horn"
"short form of Lavinia"
"settlement of the Britons"
"midsummer, summer solstice"
"from Leicester; possibly heavenly"
"elf counsel"
"champion"
"Noble and famous"
"of Rome, Roman woman"
Similar sound: These names share phonetic patterns with Edwina — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Edwina.
Rhythm: Edwina is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.