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"
"blessed ring, white circle (Welsh derivation)"
"market trader, merchant"
"the king"
"grey, grey-haired"
"paulownia tree, nobility (桐)"
"broad fortified settlement"
"young bear, small animal"
"ever powerful"
"noble, of noble type"
"lean, thin one"
"horse lover"
"adventurous, wanderer"
"high, noble"
"eminence, hill"
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.