Somerset County is the southernmost county in the state of Maryland, on the east coast of Maryland. Her name is Mary, Lady Somerset, wife of John Somerset and daughter of Thomas Arunde. She was the sister of Anne Calvert, Baroness of Baltimore, of maternal surname Arundell, the wife of Cæcilius Calvert, second Baron of Baltimore. The county seat is Princess Anne. In 2000, its population is 24,747.