Sven sits next to 3 phonetic neighbors — Sten, Swen, and Sveinn are the closest matches by sound. Most share Sven's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"young warrior, young man"
"lover of horses"
"god of thunder and strength"
"army friend, honorable companion"
"warrior"
"ruler of the home, home ruler"
"champion of the people"
"wise power"
"diminutive of Hans (John)"
"church, one who lives by a church"
"praiseworthy"
"deciding warrior"
"little rock, harmony"
"chamber, enclosed space"
"from Laurentum (city of laurels)"
Similar sound: These names share phonetic patterns with Sven — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Sven.
Rhythm: Sven is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.