Renne sits next to 4 phonetic neighbors — Rene, Renee, and Benne are the closest matches by sound. Most share Renne's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"reborn, born again"
"noble, bright"
"market trader, merchant"
"adventurous, wanderer"
"fond of horses"
"blessed ring, white circle (Welsh derivation)"
"noble, of noble type"
"paulownia tree, nobility (桐)"
"eminence, hill"
"ever powerful"
"lean, thin one"
"young bear, small animal"
"shield wolf (derived from Randy/Randolph)"
Similar sound: These names share phonetic patterns with Renne — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via French origins, giving them the same cultural heritage as Renne.
Rhythm: Renne is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.