1911 Encyclopædia Britannica (1911)
“ The word “jolly-boat,” the name of a ship’s small broad boat, usually clinker-built, is of doubtful etymology. It occurs in English in the 18th century, and is usually connected with Dan. or Swed. jolle, Dutch jol, a small ship’s boat; these words are properly represented in English by “yawl” originally a ship’s small boat, now chiefly used of a rig of sailing vessels, with a cutter-rigged foremast and a small mizzen stepped far aft, with a spanker sail (see Rigging) . A connexion has been suggested with a word of much earlier appearance in English, jolywat, or gellywatte. ”
