Vi sits next to 5 phonetic neighbors — Vee, Lee, and Kai are the closest matches by sound. Most share Vi's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great, majestic"
"dweller by the Rhine river"
"the metal iron, element of strength and endurance"
"devoted to Demeter, goddess of harvest"
"light breeze, gentle wind"
"already; already seen"
"sun of the faith, sun of religion"
"coined American name; no classical etymology"
"Virtuous, worthy, able"
"stream, rivulet, small river"
Similar sound: These names share phonetic patterns with Vi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Vietnamese origins, giving them the same cultural heritage as Vi.
Rhythm: Vi is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.