Shawna sits next to 4 phonetic neighbors — Shauna, Shana, and Dawna are the closest matches by sound. Most share Shawna's Hebrew via Irish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"smiley, cheerful"
"gift freely given by the gods"
"My God is Yahweh"
"from the Lennox district of Scotland"
"elevated, sublime"
"God is my refuge, noble"
"miracle"
"of the Romilly family, Norman nobility"
"life + angelic suffix"
"of the birds, bird-like"
"enduring inheritance, what is left behind"
"beautiful, lovely"
"associated with harbor or gate (popular folk etymology from Latin '..."
"fairy queen (folk etymology)"
"summit meeting, diplomatic gathering"
"harvest time, autumn"
"heavenly flower of the night"
"beautiful birth, beloved child"
"epithet of Demeter (goddess of harvest)"
"pure, clear"
Similar sound: These names share phonetic patterns with Shawna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Irish origins, giving them the same cultural heritage as Shawna.
Rhythm: Shawna is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.