Vivan sits next to 4 phonetic neighbors — Vivian, Vivaan, and Ivan are the closest matches by sound. Most share Vivan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"alive, full of life"
"luxury, abundance"
"griffin-like (legendary creature)"
"surname of uncertain origin"
"farm on stony ground"
"army, nobleman"
"young man, boy"
"white, fair-haired"
"possessing goodness; gift"
"famous journey"
"son of Roger, famous spear"
"the sparrow bird"
"meditation, consciousness"
"belief, faith, creed"
"strength, power"
"stone of Obsius"
"devoted one"
"sad, sorrowful (folk etymology)"
"peaceful will"
"wealthy, God's gift"
"short form of Cleopatra"
Similar sound: These names share phonetic patterns with Vivan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin (Vivianus) origins, giving them the same cultural heritage as Vivan.
Rhythm: Vivan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.