Sunny sits next to 5 phonetic neighbors — Honey, Bunny, and Winnie are the closest matches by sound. Most share Sunny's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"cheerful, bright like the sun"
"great one, month of May"
"heavenly, of the sky"
"from Saint-Denis"
"little ruler, impulsive one"
"beloved, wished-for child"
"born in winter"
"noble, kind"
"of noble birth"
"noble natured"
"fair, white, blessed"
"of the Magdalene order"
"lily flower"
"beloved, much loved"
"little one, darling"
"bride"
"star of the sea"
"industrious ruler"
"ring of light"
"divine grace, blessing"
Similar sound: These names share phonetic patterns with Sunny — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Sunny.
Rhythm: Sunny is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.