The name Sachin is derived, via Indic languages like Bengali and Marathi, from the Sanskrit name Shachindra. Shachindra is a name given to Hindu mythological god Indradhanush which means Shachi's Indra. Shachi was one of the wives of Indra. It is also a name of Hindu god Shiva.
Name Nishad generally means Seventh note on Indian musical scale, is of Indian origin, Name Nishad is a Masculine (or Boy) name. Person with name Nishad are mainly Hindu by religion.