What is "nandvanshi"

Nandvanshi is a term designating the descendants of Nanda (also known as Nandagopa). According to the Harivamsha and the Puranas, Nanda was the head of the Gopas, a tribe of cowherds referred as Holy Gwals. Vasudeva took his new-born son Krishna to Nanda on the night of the child's birth so that Nanda could raise him.