Robert Shirley, English soldier and diplomat (b. 1581)
Sir Robert Shirley (or Sherley; c. 1581 – 13 July 1628) was an English traveller and adventurer, younger brother of Sir Anthony Shirley and Sir Thomas Shirley. He is notable for his help modernising and improving the Persian Safavid army according to the British model, by the request of Shah Abbas the Great. This proved to be highly successful, as from then on the Safavids proved to be an equal force to their arch rival, the Ottoman Empire.