He was the eldest son of Christopher Lockwood, of Sowerby, Yorkshire, by Clare, eldest daughter of Christopher Lascelles, of Sowerby and Brackenborough Castle, Yorkshire. With the second son, Francis, he arrived at Reims on 4 November, 1579, and was sent to Douai College to study philosophy.
Francis was ordained in 1587, but John entered the English College, Rome, on 4 October, 1595,and was ordained priest on 26 January, 1597. He was sent on the English mission, 20 April, 1598.
After suffering imprisonment he was banished in 1610, but returned, and was again taken and condemned to death, but reprieved. He was finally captured at Wood End, Gatenby, the residence of Bridget Gatenby, and executed with Edmund Catherick.
- Joseph Gillow, Bibl. Dict. Eng. Cath., s. v.;
- Richard Challoner, Memoirs of Missionary Priests, II, No. 168;
- Thomas Francis Knox, Diaries of the English College, Douay (London, 1878), 157;
- Joseph Foster, Visitation of Yorkshire (London, privately printed, 1875), 61, 549;
- Catholic Record Society's Publications (London, privately printed, 1905, etc.), V, 384.