Jona sits next to 4 phonetic neighbors — Jonah, Jonas, and Jona are the closest matches by sound. Most share Jona's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"peace"
"faith, reliance, confidence"
"sky, heaven"
"varies by given names the initials represent"
"happy, fortunate"
"God the Lord"
"great one"
"homestead on the rock"
"Yahweh is gracious"
"modern invented name, variant of Javion"
"resolute, brilliant"
"of the river (if -von is from Welsh afon)"
"from the riverbank settlement"
"modern invented name, possibly eight (from Octavian)"
"thicket keeper"
"fashionable, sharp (modern connotation)"
"resolute protector"
"moon, moonlight"
"noble, bright"
"belonging to the night"
Similar sound: These names share phonetic patterns with Jona — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Jona.
Rhythm: Jona is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.