Kylan sits next to 4 phonetic neighbors — Kyla, Kyle, and Dylan are the closest matches by sound. Most share Kylan's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"narrow channel, strait"
"noble one, of noble lineage"
"torch, bright light"
"thunder, resounding"
"God is gracious (via Irish Sean/John)"
"dark one"
"joyful sea, ocean of joy"
"modern blend, possibly dark and heavenly"
"divine, noble"
"of the heavenly sky"
"little dark-haired one"
"divine, heavenly"
"hazel tree"
"she who must be loved"
"free woman"
"dweller near the marsh"
"lake, waterfall"
"purity, moral cleanliness"
"beautiful serpent (wisdom)"
"snow"
Similar sound: These names share phonetic patterns with Kylan — 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 Kylan.
Rhythm: Kylan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.