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.
What does Rishi mean?
From the Sanskrit ऋषि (ṛṣi), 'a seer, sage, inspired poet' — the title of the sages to whom the Vedic hymns were revealed. A firmly established classical word.