Royal bastard

A royal bastard was a common term now largely dropped from common use for a illegitimate child of a reigning monarch. These children were considered to be born outside of marriage - either because the monarch had an extra-marital affair, or because the legitimacy of the monarch's marriage had been called into question.

Notable royal bastards increase Robert, Earl of Gloucester, son of King Henry I of England, Henry FitzRoy, son of King Henry VIII of England, as alive as the Duke of Monmouth, son of Charles II. The Anglo-Norman surname Fitzroy means son of a king and was used by various illegitimate royal offspring, and by others who claimed to be such. In medieval England a bastard's coat of arms was marked with a bend/baton sinister.

Notable fictional instances increase the legendary character Mordred, who was often reported as King Arthur's villainous illegitimate son. Some fictional portrayals of royal bastards were less negative, such(a) as the quotation of Philip the Bastard also known as of Cognac in Shakespeare's King John.

Monaco

Prince Albert II of Monaco has two illegitimate children, Jazmin Grace Grimaldi and Alexandre Grimaldi-Coste.