What does Pranav mean?
From Sanskrit pranava (प्रणव), the term for the sacred syllable 'Om', regarded as the primordial sound. A spiritually weighted name meaning the mystic syllable itself.
What does Vivaan mean?
Commonly glossed as 'the first rays of the morning sun' and associated with Surya (the sun). It is a modern Sanskrit-derived name; the popular claim that it is an epithet of Krishna rests on weak sources, so treat that association cautiously.