Leonard Birnie Strang FRCP (13 May 1925 in East Kilbride – 24 June 1997) was a Scottish born, British professor of Paediatric sciences and was a Secretary of the Paediatric Committee of the Royal College of Physicians. He was considered an outstanding clinical observer, contributing to the first accounts of harlequinism and of catecholamine secretion in neuroblastoma. However it was his later work that Leonard Strang became famous, leading a team over two decades studying pulmonary vasculature in the perinatal period and even more the central role that secretion of lungs containing fluid plays in lung formation and preparation for birth.