Spring sits next to 3 phonetic neighbors — Erin, Fern, and Lynn are the closest matches by sound. Most share Spring's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to leap or jump"
"slender, slim"
"the Lord is my strength"
"defender, helper"
"tender, softness"
"pure"
"royal woodland clearing"
"from Sebaste, revered, venerable"
"little rock, harmony"
"from the Roman settlement"
"famous wolf"
"cloud, mist, fog"
"full of goodness"
"night beauty, celestial"
"may Yahweh give increase"
"Bright, shining light; torch"
"bright, splendid"
"official of Yah"
"bright, radiant, shining"
"high meadow, bright clearing"
"maiden of the coral"
Similar sound: These names share phonetic patterns with Spring — 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 Spring.
Rhythm: Spring is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.