Sir Charles Cavendish (1620-1643). Son of The 2nd Earl of Devonshire and cousin to William Cavendish, Earl of Newcastle. Fought at Edge Hill and given command of the Duke of York's troop. Formed his own regiment of horse. Accompanied Henrietta Maria to Newark which he made his HQ. Took Grantham in March 1643 and killed at Gainsborough in July 1643.
Henry Stanley, 4th Earl Of Derby, maternal cousin of Elizabeth I, husband of Margaret Clifford, granddaughter of Princess mary Tudor
Henry Stanley, 4th Earl Of Derby, maternal half first cousin once removed of Elizabeth I. (His mother Dorothy Howard was the half sister of the Queen's grandmother Elizabeth Howard Boleyn,) Husband of Margaret Clifford, granddaughter of Princess Mary Tudor.
Sir John de Sully
Signet ring of the Black Prince. In 1337, Edward, the Black Prince was created Duke of Cornwall, taking precedence over all earls. Dukedoms were reserved for members of the Royal Family until 1387, when Robert de Vere, 9th Earl of Oxford, the favourite of Richard II, was created Duke of Ireland for life. De Vere had previously been created Marquess of Dublin for life, making him the first person to hold a dignity of such a rank between Dukes and Earls.