* It's a misspelling. Perhaps you meant "Vivian" or "Vivien," which are common names of French origin.
* It's a name from a specific culture or language. There might be a word or name that sounds like "Vivansh" in a particular language or dialect. If you can provide more context about where you encountered this word, I might be able to help you find its meaning.
* It's a made-up word. It's possible that "Vivansh" is a unique creation, perhaps a fictional name or a word with a specific meaning within a particular context.
Please provide more information so I can better understand what you're looking for.