Bruce-Lockhart is one of the sons of Patrick Bruce Lockhart (1918–2009), an obstetrician, by his marriage in 1942 to Mary Campbell Seddall. His parents emigrated from Britain to Canada in 1953, and after his mother's death in 1960 his father remarried and had more children, two more sons and a daughter.
[1] He is the brother of Michael Bruce-Lockhart (born 1947), now retired as Professor of Computer Engineering at Memorial University of Newfoundland, and they also have a younger full sister, Ferelyth.[2]
The Bruce Lockhart family has a long tradition of teaching. Bruce-Lockhart's grandfather, John Bruce Lockhart, was headmaster of Sedbergh School, in the north of England, and two of his uncles, Rab and Logie Bruce Lockhart, were headmasters who had played rugby union for Scotland. His great-grandfather, Robert Bruce Lockhart (1858–1950), was a Scottish headmaster born at Montreal, in Canada, and he lived long enough for them to meet.[3]
Bruce-Lockhart was educated at Ridley College, Ontario, from 1962 to 1967,[4] where he was a school prefect in his final year,[5]
and Yale, where he graduated BA.[6]