Adna sits next to 4 phonetic neighbors — Edna, Adena, and Adina are the closest matches by sound. Most share Adna's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pleasure, delight"
"Wide meadow or wide island"
"fawn, young deer"
"walking, pace, progress"
"follower of Christ"
"source of joy, amusing"
"peaceful ruler"
"defender of the people (from Greek roots of Lex)"
"grandmother, elder woman"
"miracle of God"
"gift of God"
"sun and moon combined"
"Bright future"
"born of fire, handsome"
Similar sound: These names share phonetic patterns with Adna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew adnah origins, giving them the same cultural heritage as Adna.
Rhythm: Adna is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.