Perrin sits next to 4 phonetic neighbors — Perry, Perren, and Perrine are the closest matches by sound. Most share Perrin's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little rock, little stone"
"descendant of the gentle one"
"healer"
"little drop of water"
"of gold, golden one"
"lapis lazuli (the stone)"
"acquired, craftsman (via Hebrew Cain/Kaine)"
"son of Guy"
"army man, warrior"
"holy one (of Dewi/David)"
"God-like, divine warrior"
"modern phonetic creation"
"to set, to place, to establish"
"lion"
"speed of God"
"vigorous ruler"
"Ireland, land of the west"
"son of Ay, moon's son (via Turkish)"
"God has given"
"little Hugh"
Similar sound: These names share phonetic patterns with Perrin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French diminutive of Pierre origins, giving them the same cultural heritage as Perrin.
Rhythm: Perrin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.