A helpful list - no cheating at Mastermind
The Royal Houses of Britain - a chronology.
Norman
1066 William 1
1087 William II
1100 Henry I
1135 Stephen
Angevin
1154 Henry II
1189 Richard I
1199 John
Plantagenet
1216 Henry III
1272 Edward I
1307 Edward II
1327 Edward III
1377 Richard II
Lancaster
1399 Henry IV
1413 Henry V
1422 Henry VI
York
1461 Edward IV
1483 Edward V
1483 Richard III
Tudor
1485 Henry VII
1509 Henry VIII
1547 Edward VI
1553 Mary
1558 Elizabeth I
Stuart
1603 James 1 & VI
1625 Charles I
1649 - 1660 Commonwealth
1660 Charles II
1668 James II
1689 William & Mary
1702 Anne
Hanover
1714 George I
1727 George II
1760 George III
1820 George IV
1830 William IV
Saxe-Coburg
1837 Victoria
1901 Edward VII
Windsor
1910 George V
1936 Edward VIII
1936 George VI
1952 Elizabeth II