He was born at Barnwell in Northamptonshire on 27th July 1625, the eldest surviving son of Sir Sydney Montagu (or Mountagu ... After Cromwell's death he became, with George Monk, an 'architect' of the ...
He also helped in the foundation of the colony of Nova Scotia in Canada and the capital was called Halifax after him. His only legitimate daughter Elizabeth married John Montagu, 5th Earl of Sandwich.