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Following up on my prior post on retroactive suffixes, I’ll now discuss the other practice of retroactive surnames. This frequently occurs in publications relating to royalty in the medieval period, the best example being the “surname” Plantagenet. Geoffrey V, Count of Anjou (1113-1151), had Plantagenet as an epithet or nickname, but this was not used as a surname by himself or his children. His son Henry II became King of England in 1154 as the first Angevin monarch, as Geoffrey was a member of the House of Anjou. Three centuries later in 1448, Geoffrey’s great-great-great-great-great-great-great-grandson Richard, 3rd Duke of York (1411-1460), adopted “Plantagenet” as his family name. The surname Plantagenet was even used by two illegitimate children of Richard’s son King Edward IV. However, Richard’s male line soon died out in the aftermath of the Tudor conquest of England in 1485. The last living legitimate male born with the surname Plantagenet was Richard’s grandson, Edward Plantagenet, Earl of Warwick, who was beheaded in 1499, and King Edward IV’s illegitimate son Arthur Plantagenet, Viscount Lisle, died in 1542. Continue reading Retroactive surnames