Shown sits next to 4 phonetic neighbors — Sean, Shawn, and John are the closest matches by sound. Most share Shown's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"always powerful"
"possessor of old wisdom (mythological)"
"I awake, I am awake"
"from the shorn or cleared land"
"compound of William (protector) and Joseph (God adds)"
"label, identifying mark; to touch lightly"
"dweller by a spring or well"
"narrow strait or channel"
"to tame, subdue"
"shield wolf, brave protector"
"invented name with La- prefix (the) and Voris (from the ford, Dutch..."
"Bright forest; from the forested settlement; variant of Sylvester"
"warm earthy hue; tanned"
Similar sound: These names share phonetic patterns with Shown — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Irish origins, giving them the same cultural heritage as Shown.
Rhythm: Shown is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.