Alannah sits next to 3 phonetic neighbors — Alana, Hannah, and Savannah are the closest matches by sound. Most share Alannah's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beautiful, lovely"
"torch, bright one"
"lily flower"
"fairy queen (via Titania)"
"beloved, precious"
"each of the two, pure"
"jasmine flower"
"God's wonder"
"gracious, dear one"
"eastern lands"
"bird"
"life"
"heifer, young calf"
"son of Carr, marsh dweller's son"
"jade, precious green stone"
"variant of Nyla: champion, achiever"
"from the Tinsley place (South Yorkshire)"
"black, dark"
"gift of God"
"hare's woodland clearing (via Harley)"
"beautiful"
Similar sound: These names share phonetic patterns with Alannah — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Alannah.
Rhythm: Alannah is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.