NĀNŪ, BHĀĪ, a Sikh contemporary of Gurū Tegh Bahādur and Gurū Gobind Siṅgh, was, according to Bhaṭṭ Vahī Multānī Sindhī, the son of Bāghā, a Chhīmbā (linen-printer) resident of Mohallā (ward) Dilvālī Sikhāṅ in the city of Delhi. According to Kesar Siṅgh Chhibbar, Baṅsāvalīnāmā Dasāṅ Pātshāhīāṅ Kā, it was Bhāī Nānū who reclaimed the severed head of Gurū Tegh Bahādur from Chāndanī Chowk, the site of the Gurū's execution in November 1675, and, accompanied by Bhāī Jaitā, a Raṅghreṭā Sikh, also of Delhi, carried it to Anandpur, where Gurū Gobind Siṅgh cremated it with due honour. Bhāī Nānū who later took the rites of the Khālsā and became Nānū Siṅgh, was, according to Bhaṭṭ sources, killed in the battle of Chamkaur on 7 December 1705. His two sons, Gharbārā Siṅgh and Darbārā Siṅgh, were also in the retinue of Gurū Gobind Siṅgh. Gharbāra Siṅgh laid down his life fighting in the battle of Agamgaṛh Fort, near Anandpur, on 31 August 1700.
Major Gurmukh Siṅgh (Retd.)