Lord Calvin d'al Cazarosta, Earl of Leoniscourt (561-) is a famed Tierran diplomat. Known for his conciliatory nature, the fourth earl was a particular favourite of King Edwin IV, who would use him to defuse the domestic turmoils caused by the king's own bumbling. He was the son of Caedwin d'al Cazarosta and the adoptive father of Caius d'al Cazarosta.