Basic Details Surname Clemens Forenames Theodore Gender Male Information stated on memorial Alternative forename Frederick William Theodor War First World War (1914-1918) Served or died Died Notes HMS Defence was a cruiser sunk in 1916 Primary Service As stated on memorial Service (Primary - Stated) Navy (RN) Unit (Primary - Stated) HMS Defence (Cruiser) sunk 1916 Rank / Title (Primary - Stated) Surgeon Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Defence Rank / Title (Primary - Our reference) Surgeon Death and Burial details Manner of death as stated Unknown