Jonas sits next to 5 phonetic neighbors — Jonah, Jones, and Johannes are the closest matches by sound. Most share Jonas's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dove"
"title of honor, great one"
"to follow a course, leave a mark"
"little warrior, war-associated"
"divine, god-like"
"watchful, vigilant (via Casey influence)"
"one who cuts cloth, tailor"
"ruler of the people"
"fifth"
"gift of God"
"large homestead, great settlement"
"dark-complexioned"
"triumphant champion"
"narrow strait, channel"
"son of Benedict/Benjamin"
"divine power (from Oswald)"
"lives near reeds"
"arrow maker"
"burdened, laden"
"to live, to dwell"
"from the valley town"
Similar sound: These names share phonetic patterns with Jonas — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew Yonah (יוֹנָה) origins, giving them the same cultural heritage as Jonas.
Rhythm: Jonas is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.