Shena sits next to 4 phonetic neighbors — Sheena, Shana, and Shona are the closest matches by sound. Most share Shena's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"bright, shining"
"faith"
"gift of God"
"God is my oath"
"pure"
"American creative invention"
"eagle"
"prince, hill settlement"
"Possibly a variant of Teresa/Therese, meaning to reap or harvest"
"follower of Dionysus"
"Variant of Sherman; from the shearing settlement"
"shining renown"
"follower of Christ"
"Of the sea, warrior; defender of the sea"
"free person, strong one (via Carla/Carl)"
"pure, clear"
Similar sound: These names share phonetic patterns with Shena — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Shena.
Rhythm: Shena is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.