SUNDAR SIṄGH, BHĀĪ (1882-1921), one of the Nankāṇā Sāhib martyrs, was born on 1 Assū 1939 Bk/15 September 1882, the son of Bhāī Chugatt Siṅgh and Māī Jīo, of Gurdāspur district. The family migrated to Chakk No. 33 Dhārovāli in Sheikhūpurā district (now in Pakistan). Sundar Siṅgh enlisted himself in the army and served with the 11th Cavalry for seven years. Once displaying to those present pictures of Bhāī Hazārā Siṅgh and Bhāī Hukam Siṅgh, killed by the priests of Tarn Tāran, Bhāī Lachhmaṇ Siṅgh of Dhārovālī appealed for volunteers to indemnify the sacrilege which had been going on in the gurdwārās under the administration of the mahants. Bhāī Sundar Siṅgh offered his services on the spot. His offer was accepted on the condition that he would strictly abide by the Khālsā rahit. Sundar Siṅgh took the vows of Khālsā at Gurdwārā Kharā Saudā and was formally registered as an Akālī volunteer. On receiving the call for liberating Gurdwārā Janam Asthān at Nankāṇā Sāhib, he joined the Dhārovālī jathā massacred to a man by the hired assassins of Mahant Naraiṇ Dās on 20 February 1921.

        Bhāī Sundar Siṅgh was survived by his mother and wife to whom a son was born in July 1921. The Shiromaṇī Gurdwārā Parbandhak Committee settled upon them an annual pension of Rs 160, besides paying off the family's debt of Rs 1488.