Bjarne sits next to 4 phonetic neighbors — Bjorn, Biarne, and Bjarni are the closest matches by sound. Most share Bjarne's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bear"
"one who grows in virtue"
"army man, warrior"
"dweller at the wood"
"famous warrior (from Louis/Ludwig)"
"sandy shore, coastal land"
"of the forest people"
"light-haired, pale-complexioned"
"cat genus name"
"pledge, servant"
"a thick bush or clump of ivy"
"work and power"
"valley dweller"
"to spin; to whirl; wild"
"to help, to save, to rescue"
Similar sound: These names share phonetic patterns with Bjarne — 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 Bjarne.
Rhythm: Bjarne is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.