1) Area of Portsmouth 
Cosham (əm, archaically əm) is a northern suburb of Portsmouth lying within the city boundary but off Portsea Island. It is mentioned in the Domesday Book of 1086 along with Drayton and Wymering (mainland) and Bocheland (Buckland), Frodington (Fratton) and Copenore (Copnor) on the island. The name is of Saxon origin (shown by the -ham suffix) an...