Poppy sits next to 4 phonetic neighbors — Polly, Molly, and Penny are the closest matches by sound. Most share Poppy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"poppy flower"
"remedy, cure"
"lovable, dear"
"crown of laurels"
"from the crooked stream"
"flourishing, prosperous"
"divine play"
"crowned one"
"birthday (of the Lord)"
"goddess of spring and growth"
"boomerang"
"temple servant, attendant at ritual"
"hazel wood clearing (interpretive)"
"purity, grace"
"pale, fair"
"work-power, industrious strength"
"lion of God"
"garden, vineyard"
"of noble kind"
"son of Coinneach, the fair one"
Similar sound: These names share phonetic patterns with Poppy — 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 Poppy.
Rhythm: Poppy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.