Lonnie sits next to 4 phonetic neighbors — Ronnie, Connie, and Bonnie are the closest matches by sound. Most share Lonnie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ready for battle, noble"
"musical balance and agreement"
"lovable, dear"
"light, radiance, brilliance"
"innocence, beauty"
"religion, religious"
"fame, renown"
"lake-bright (combined Welsh elements)"
"pearl"
"gentle enclosure"
"crowned one"
"helmeted chief"
"life"
"strength, hill (from Irish Bree)"
"grace, favor"
"God is my light"
"gracious, dear"
"noble, exalted kind"
"wood merchant"
"fifth (from Latin Quintus)"
"adventure, wandering"
Similar sound: These names share phonetic patterns with Lonnie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic (via Alonzo) origins, giving them the same cultural heritage as Lonnie.
Rhythm: Lonnie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.