Kaja sits next to 4 phonetic neighbors — Kaya, Maia, and Kaia are the closest matches by sound. Most share Kaja's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure, clear (via Katherine)"
"Divine spirit, intermediary deity"
"of noble birth"
"fair, white, blessed"
"gracious, full of grace"
"Diminutive form of Eleanor, bright and compassionate"
"glory and wolf"
"Emerald (folk etymology)"
"hope, aspiration"
"She who rises, one reborn"
"follower of Christ (short for Christopher)"
"secret, mystery"
"Destroyer (Apollo's archaic meaning)"
"the other Aenor (Aliénor)"
"new day, dawn of a new day"
"noble, of noble birth"
"one who illuminates, shines"
"true, truthful"
"bright, shining one"
Similar sound: These names share phonetic patterns with Kaja — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Kaja.
Rhythm: Kaja is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.