Nandvanshi
Nandvanshi is a term designating the descendants of Gokul King Nanda (also known as Nandagopa). According to the Harivamsha and the Puranas, Nanda was the head of the Gopas, a tribe of cowherds Yadavas referred as Holy Gwals. Vasudeva took his new-born son Krishna to his brother (cousin) Nanda on the night of the child's birth so that Nanda could raise him.
Nandavanshi
When Yashoda and Nanda met Lord Krishna for the last time, Krishna gave Nanda 64 of his sons, eldest being Duhra Rao. Krishna told Duhra Rao to write down the lineage of Nandavanshis. Thus, Yadavs of Duhraiya gotra write down the Jāgā (identical to Pothī) of Nandavanshis. Records of peedi(s) upto 100 can be found still in Dakhiya village of Rajasthan in the north. Selected uhraiya still come to the homes of Nandavanshis in order to update their Jāgā in every 2 years.