(named after the Roman province corresponding to modern Portugal and portions of western Spain) a British ocean liner launched by the Cunard Line in 1906.

a British ocean liner and the lead ship of the White Star Line's trio of liners.

a retired British ocean liner that operated primarily on the North Atlantic Ocean from 1936 to 1967 for the Cunard Line.

a Cunard Line transatlantic passenger steamship built by Swan Hunter & Wigham Richardson in their shipyard in Wallsend, England.

an ocean liner operated by Cunard Line.

a British-built ocean liner that sank near the mouth of the Saint Lawrence River in Canada following a collision in thick fog with the Norwegian collier in the early hours of 29 May 1914.

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