Sir John de Menteith (c. 1275 – c. 1323) was a Scottish nobleman. On August 3, 1305, William Wallace was captured at Robroyston, near Glasgow. His captor, Sir John Menteith, the ‘false’ Menteith, has gone down in Scottish legend as the betrayer of Wallace, but he acted as many others would have. Menteith was no English lackey, and in 1320 he put his seal to the Declaration of Arbroath.