Kumar was born on 1 July 1938 at Phoolkan Village in Sirsa District,
Haryana. His
gotra is Dusad. His father Ch. Kashi Ram was an ordinary farmer
kisan. His grandfather, Ch. Kirta Ram was known as Bhagatji (devout) and an expert in natural medicines. For studies, the boy Vinay Kumar was taken by
Swami Keshwanand to Grammothan Vidyapeeth,
Sangaria (Rajasthan), where he studied up to Matriculation. He passed his B.A. and M.A. (History, Public Administration) privately while employed. He was married to Smt. Parmeshwari Devi on 30 June 1957. The couple have two sons, Dr. Sudhir Chaudhary (Phoenix, AZ, USA) and Dr. Inderjeet Singh, Director, ICAR-Central Institute for Research on Buffaloes (CIRB) in Hisar, India (till 2018), Director, Animal Husbandry Department, Punjab (2018-2020) and now serving as Vice-Chancellor, Guru Angad Dev Veterinary and Animal Sciences University (GADVASU), Ludhiana (Punjab). ==Career==