Kylen sits next to 4 phonetic neighbors — Kyle, Kylan, and Dylan are the closest matches by sound. Most share Kylen's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"narrow, a strait"
"healer (via Jason)"
"home power, ruler of work"
"valley, dell"
"brave in battle, vigilant"
"the twin"
"new house"
"watchful, vigilant (via Casey influence)"
"dweller near the heath"
"Gomeric's mountain, power mountain"
"descendant of the sea warrior"
"ruler of the people"
"bright-headed"
"primordial deity, elder god"
"helpful one"
"leader, commander (variant interpretation)"
"God has remembered"
"mountain goat, to ascend"
"little hawk or blackbird"
"triumphant, victorious"
"dark warrior"
Similar sound: These names share phonetic patterns with Kylen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Kylen.
Rhythm: Kylen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.