Biden sits next to 4 phonetic neighbors — Brayden, Aiden, and Hayden are the closest matches by sound. Most share Biden's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the valley"
"strong as a wild boar"
"skilled artisan"
"the direction of the rising sun"
"wise one (from connection to sacred well)"
"very white, very fair"
"noble estate"
"fire and blood (fictional Valyrian)"
"an extremely large, uncountable number; boundless"
"barley storage"
"dark foreigner; dark stranger"
Similar sound: These names share phonetic patterns with Biden — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Anglo-Saxon origins, giving them the same cultural heritage as Biden.
Rhythm: Biden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.