Born: 1623. Died: 1687.
When Oliver Cromwell's British forces invaded Ireland in the 1650s, a slight problem emerged: how to partition the spoils among the victors or, more precisely, what were the spoils? The task of surveying Ireland and assessing its riches was given to a physician which had accompanied the British army, Sir William Petty. Thus, the first 'econometrician' was born.
Petty's work on Ireland is found in his 1672 Political Anatomy of the country.