The word Tories was originally used to describe rural bandits in Ireland. In the 17th century it had become a term applied to monarchists in the House of Commons. By the 18th century the Tories were politicians who favoured royal authority, the established church and who sought to preserve the traditional political structure and opposed parliamentary reform. After 1834 this political group in the House of Commons preferred to use the term Conservative.
From www.spartacus.schoolnet.co.uk