Shirley sits next to 4 phonetic neighbors — Sheryl, Sherry, and Cheryl are the closest matches by sound. Most share Shirley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright clearing in the woods"
"delightful, nectar-like"
"son of Adam"
"light, bright, shining"
"narrow road or path"
"fortified place"
"promised by Yahweh"
"exalted, sublime, high"
"beautiful, rosebud"
"bright, visible"
"Jewish woman"
"knowledge, sacred wisdom"
"princess"
"goodness, beneficence"
"burnt meadow"
"lapis lazuli"
"land of the black soil"
"crown, wreath of victory"
"hay meadow"
"boar meadow, wild boar clearing"
Similar sound: These names share phonetic patterns with Shirley — 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 Shirley.
Rhythm: Shirley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.