HMCS Beaver was an armed yacht that served in the Royal Canadian Navy during the Second World War. Originally named Aztec, the yacht was requisitioned for service in the United States Navy during the First World War under the same name. Returned to her owner in 1919, the yacht was laid up in 1931 following her owner's death. The vessel was purchased via a third party for service in the Royal Canadian Navy and after commissioning, Beaver was primarily used as a training ship with limited time as a patrol vessel. Following the war she was sold in 1946 and broken up for scrap in 1956.