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"
"great, kingly"
"raven (sacred Celtic bird)"
"skilled, expert, proficient"
"modern coinage"
"son of Ken, son of the bold"
"settlement of Leaxa's people"
"little king"
"gray, silver-haired"
"of gold, golden one"
"wise ruler, ruler's advisor"
"bold ruler, chief power"
"of the valley"
"rye land, land of rye fields"
"one of the primordial ruling gods"
"joyful, jovial (from the same root)"
"fire brand, flaming sword"
"bear king"
"one who strides, walks with purpose"
"wise, clever, intelligent"
"peaceful town"
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.