HMCS Annan was the name of multiple ships of the Royal Canadian Navy:
HMCS Toronto was a River-class frigate that served in the Royal Canadian Navy during the Second World War and as a Prestonian-class frigate from 1953-1956. She was named for Toronto, Ontario. She was later acquired by the Royal Norwegian Navy and renamed Garm and then again in 1965 as HNoMS Valkyrien.
The Tacoma class of patrol frigates served in the United States Navy during World War II and the Korean War. Originally classified as gunboats (PG), they were reclassified as patrol frigates (PF) on 15 April 1943. The class is named for its lead ship, Tacoma, a Maritime Commission (MARCOM) S2-S2-AQ1 design, which in turn was named for the city of Tacoma, Washington. Twenty-one ships were transferred to the British Royal Navy, in which they were known as Colony-class frigates, and twenty-eight ships were transferred under Lend-Lease to the Soviet Navy, where they were designated as storozhevoi korabl, during World War II. All Tacoma-class ships in US service during World War II were manned by United States Coast Guard crews. Tacoma-class ships were transferred to the United States Coast Guard and various navies post-World War II.
Several Canadian naval units have been named HMCS Vancouver. One was named for the explorer George Vancouver, the others after the city of Vancouver.
The River class was a class of 151 frigates launched between 1941 and 1944 for use as anti-submarine convoy escorts in the North Atlantic. The majority served with the Royal Navy (RN) and Royal Canadian Navy (RCN), with some serving in the other Allied navies: the Royal Australian Navy (RAN), the Free French Navy (FFN), the Royal Netherlands Navy and, post-war, the South African Navy (SAN).
Several Canadian naval units have been named HMCS Ville de Quebec.
Several units of the Royal Canadian Navy have been named HMCS Stormont.
HMCS Fort Erie was a River-class frigate that served in the Royal Canadian Navy during the Second World War and as a Prestonian-class frigate from 1956-1965. She was named for Fort Erie, Ontario.
HMCS Penetang was a River-class frigate that served in the Royal Canadian Navy from 1944 to 1945 during the Second World War. She fought in the Battle of the Atlantic as a convoy escort. She was recommissioned and served as a Prestonian-class frigate from 1954 to 1956. She was named for Penetanguishene, Ontario.
USS Natchez (PG-102/PF-2) was a River-class frigate acquired by the U.S. Navy during World War II. She was originally ordered and laid down as HMS Annan for the Royal Navy, and renamed as HMCS Annan for the Royal Canadian Navy before transfer to the U.S. Navy before launch. She was used for anti-submarine patrol work during the war.
Four vessels of the Royal Navy have been named HMS Ribble, after the English river:
HMCS Charlottetown was a River-class frigate that served with the Royal Canadian Navy (RCN) during the Second World War. She was the second vessel of the name, HMCS Charlottetown having been a Flower-class corvette that had been sunk earlier in the war. They are unique for being the only two ships to have shared the same pennant number, K 244. She was named for Charlottetown, Prince Edward Island.
HMCS Glace Bay was a River-class frigate built for the Royal Canadian Navy (RCN) in 1943. Commissioned in 1944 she served in the Battle of the Atlantic until the end of the Second World War. After the war she was sold to the Chilean Navy and renamed Esmeralda.
HMCS Prestonian was a River-class frigate that served with the Royal Canadian Navy during the Second World War and as a Prestonian-class frigate from 1953–1956. She saw action primarily as a convoy escort. She was named for Preston, Ontario, however due to possible confusion with HMS Preston, her name was altered. In 1956 she began service with the Royal Norwegian Navy as Troll.
HMCS Royal Mount was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She was used primarily as an ocean convoy escort in the Battle of the Atlantic. She was named for Mount Royal, Quebec, however due to possible confusion with HMCS Montreal, her name was switched around.
HMCS Chebogue was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as an ocean convoy escort in the Battle of the Atlantic. She was named for Chebogue, Nova Scotia. During the war she was torpedoed and declared a constructive loss.
HMCS Kirkland Lake was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as a convoy escort in the Battle of the Atlantic. She was named for Kirkland Lake, Ontario.
HMS Annan was a River-class frigate built for the Royal Navy but was transferred to the Royal Canadian Navy before commissioning. She served with the Royal Canadian Navy during the Second World War and saw action primarily as a convoy escort in the Battle of the Atlantic. She was returned to United Kingdom following the war and quickly sold to Denmark, who renamed the vessel Niels Ebbesen. She was primarily used as a training vessel until 1963 when she was broken up in Odense. She was named for the River Annan in Scotland in UK and Canadian service and Niels Ebbesen in Danish service.
Several units of the Royal Canadian Navy that have been named HMCS Beauharnois.
Several units of the Royal Canadian Navy have been named HMCS Royal Mount.