bedlamite

Etymology
From, in reference to the Hospital of Saint Mary of Bethlehem, a former London institution for the insane.

Noun

 * 1)  A lunatic.
 * 2) * 1808–10,, Memoirs of a Georgian Rake, Folio Society 1995, p. 91:
 * Upon coming to the edge of the outer surf, the man at the stern of our boat, steering with a long oar, began to stamp his feet and roar like a bedlamite.
 * Upon coming to the edge of the outer surf, the man at the stern of our boat, steering with a long oar, began to stamp his feet and roar like a bedlamite.