Joanna sits next to 3 phonetic neighbors — Johanna, Jana, and Joan are the closest matches by sound. Most share Joanna's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"night rain"
"fair; beautiful; harmonious"
"settlement of ravens"
"soldier"
"princess (original form of Sarah)"
"dark challenger"
"lady, queen"
"very sacred, utterly pure"
"youthful, downy"
"grace, favor"
"mighty man of God"
"victorious people"
"the winter season"
"gift of God"
"beautiful, torch"
"crooked nose"
"adornment, ornament"
"short form of Giovanna or Gianna"
"God is my oath"
"woodland clearing"
Similar sound: These names share phonetic patterns with Joanna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Greek and Latin origins, giving them the same cultural heritage as Joanna.
Rhythm: Joanna is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.