"Endurance" was named after the ship which Sir Ernest Shackleton used in his Antarctic expedition of 1914–1917. The names of "Endurance"s boats and landing craft continued the Shackleton connection: "James Caird" and "Dudley Docker" were named after boats carried by Shackleton's "Endurance", "Nimrod" was named after the ship which Shackleton used on his Antarctic expedition of 1907–1909, and "Eddie Shackleton" was named after the explorer's son. The motto of "Endurance", "fortitudine vincimus" ("by endurance, we conquer"), was also the Shackleton family motto.