Kylah sits next to 4 phonetic neighbors — Kylie, Kyla, and Leila are the closest matches by sound. Most share Kylah's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"narrow strait, channel"
"symbol of purity, virtue, and immortality"
"a day's travel, adventure"
"mighty in battle, strength in battle"
"ruler of the land"
"entirely beautiful"
"faithful, loyal, genuine"
"crystal clear"
"to dance"
"victory of the people (via Colin/Nicholas)"
"song of joy"
"stately, admirable"
"pearl (short form of Margaret)"
"mine, of the Lord"
"life"
"of the king, regal"
"gift of God"
"light, luminosity"
"small, humble (feminine diminutive of Paul)"
Similar sound: These names share phonetic patterns with Kylah — 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 Kylah.
Rhythm: Kylah is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.