William Brog

Colonel Sir William Brog (? - 13 March 1636) was a Scottish soldier in the service of the Kingdom of Scotland and the Dutch Republic. His early life is, at the moment, completely obscure and he only appears on record in 1588 when he rose to the rank of sergeant major in the regiment of Colonel Bartholomew Balfour. He was promoted to colonel of the first regiment of the Scots-Dutch Brigade in 1606 and held the position until 1636. Thus, he probably holds the record for the longest-serving Scottish colonel during the Eighty Years' War and the Thirty Years' War.