Sonnet sits next to 4 phonetic neighbors — Sonata, Sunny, and Scarlett are the closest matches by sound. Most share Sonnet's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little song"
"sullen, tempestuous"
"Anns meadow, grace meadow"
"torch, shining light"
"life"
"dear little rose"
"patron of music and musicians"
"high, elevated"
"cushion (archaic interpretation)"
"lake, water (from Lynn)"
"flower that blooms in adversity"
"breath of life"
"zero, spirit"
"noble kind"
"from the Roman Porcius family (related to 'porcus', pig or a family..."
"rose flower, love and beauty"
"peaceful ruler"
"light-bringer (diminutive of Lucia)"
"born of night, night beauty"
"glory, fame"
"divine gift"
Similar sound: These names share phonetic patterns with Sonnet — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Italian origins, giving them the same cultural heritage as Sonnet.
Rhythm: Sonnet is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.