Denis sits next to 5 phonetic neighbors — Dennis, Denys, and Deni are the closest matches by sound. Most share Denis's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"follower of Dionysus, god of wine"
"God has comforted; YHWH consoles"
"from Germany"
"hard spear (from Welsh Peredur)"
"divine assistance"
"powerful in battle"
"hawk-like"
"little rock"
"reputation, esteem"
"broad valley"
"protector of mankind"
"powerful and brave"
"sad, melancholy (folk etymology)"
"nobleman of the second rank"
"admirable, hawk-like"
"little bear, bear cub"
"peace, gentle"
"slender, narrow"
"from the raven (place name)"
"warrior's estate"
Similar sound: These names share phonetic patterns with Denis — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek Dionysios origins, giving them the same cultural heritage as Denis.
Rhythm: Denis is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.