Robert Aim Lennie (5 April 1889 – 26 March 1961) was Regius Professor of Midwifery at the University of Glasgow from 1946 to 1955.
Lennie was born at Cambuslang, Glasgow in 1889 the son of Ritchie Lennie (24 January 1847 – 28 June 1909), an oil and colour manufacturer, from Kincardine, (then) Perthshire, and his wife Isabella Crawford Smith, daughter of Brodie Smith, a drapery merchant, from Leslie, Fife.
R.A. Lennie graduated MB from the University of Glasgow in 1912, and was admitted as a Fellow of the Royal College of Obstetricians and Gynaecologists in 1936.
During World War I, Lennie was in command of a Desert Ambulance Train with the Royal Army Medical Corps.
A man of conservative judgement, Lennie disapproved of surgeons who were too quick, in his opinion, to solve the complexity of childbirth by induction or Caesarean section.