Johnnie sits next to 4 phonetic neighbors — Jonni, Joni, and Ronnie are the closest matches by sound. Most share Johnnie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"gentle meadow"
"most beautiful"
"fresh, pure"
"from Delphi, the oracle"
"heavenly flower, lei of heaven"
"woman of Judea"
"gracious one of the meadow"
"she who hides, concealer"
"courageous, brave (via Riley)"
"honor, esteem"
"beloved, wished-for child"
"hazelnut"
"elf friend, beloved elf"
"one who lisps, stutters"
"that which has been firmly established"
"captivating, snare"
"transparent, clear"
"free woman"
"feminine form of Leander (lion man)"
"beloved beautiful one"
Similar sound: These names share phonetic patterns with Johnnie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Johnnie.
Rhythm: Johnnie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.