Maurice, Prince Palatine of the Rhine KG (16 January 1621 ns, in Küstrin Castle, Brandenburg – September 1652, near the Virgin Islands), was the fourth son of Frederick V, Elector Palatine and Princess Elizabeth, only daughter of King James VI and I and Anne of Denmark. In April 1644, he besieged Lyme Regis, but was forced to give up the siege in June, at considerable cost to his military reputation. He fought as a subordinate at the Battle of Lostwithiel and the Second Battle of Newbury, and under Rupert at the Battle of Naseby.