Duke of Lancaster
…There were three creations of the dukedom of Lancaster during the fourteenth and fifteenth centuries. The first creation was on 6 March 1351 for Henry of Grosmont, 4th Earl of Lancaster, a great-grandson of Henry III; he was also 4th Earl of Leicester, 1st Earl of Derby, 1st Earl of Lincoln and Lord of Bowland. When he died in 1361 the…