Tory, as you know, comes from the Irish to pursue, and Whig comes from the Lowlands term '"
Whiggamore'", which in turn derived from '"whig-a-mare'", a dialect term for driving a horse forward.
And there are two slightly humorous, because perfunctory, entries in the glossary: the first being that for Whig, "a name originally given to Scottish Presbyterian rebels of the late 1640s," according to Smith, whereas the party name stems from the "
Whiggamore Raid" in west Scotland (covered in Grainger, p.
(abbr of
whiggamore, from Scot, whig, " to drive, " mere, "mare " ) (1) A name first derisively applied to raiding parties in western Scotland about 1648, then to Scottish Presbyterians.