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"
"fairy"
"shining renown"
"fertile plain"
"bright, shining"
"pure, clear"
"follower of Christ"
"Of the sea, warrior; defender of the sea"
"exalted, high mountain"
"chief, lord"
"Possibly a variant of Teresa/Therese, meaning to reap or harvest"
"God is my oath"
"free person, strong one (via Carla/Carl)"
"valley; place"
"messenger of God; angel"
"wise counsel, gentle (ewe)"
"Variant of Sherman; from the shearing settlement"
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.