Danna sits next to 4 phonetic neighbors — Dana, Donna, and Hannah are the closest matches by sound. Most share Danna's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Arbiter, judge"
"precious gem, pearl of great price"
"listener"
"storm demon, wind spirit"
"youthful; Jove's child"
"olive tree, peace"
"my God has answered"
"woodland clearing of the wren"
"heavenly, royal"
"Trojan prince"
"grace, favor"
"trembling tree"
"hedged valley"
"concord, unity of parts"
"work-power, industrious strength"
"bright red, vivid crimson"
"heroine of God"
"small bird (wren)"
"tailor, cloth-cutter"
Similar sound: These names share phonetic patterns with Danna — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Danna is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.