DESU SINGH, BHAI (d. 1781), was the second of the five sons of Bhai Gurbakhsh Singh of the well known Bhai family, deriving its name from the celebrated Bhai Bhagatu, contemporary of three successor Gurus, Guru Arjan, Guru Hargobind and Guru Har Rai. According to Bhai Santokh Singh, Garb Ganjani Tika, Desu Singh was the fifth in the line of Bhai Bhagatu`s descendants. His father, Bhai Gurbakhsh Singh, was a close associate of Ala Singh of Patiala and had carved for himself some territories around Sirhind and Kaithal besides his ancestral possessions in several villages around Bhuchcho, near Bathinda.