The hundred of Kerrier was the name of one of ten ancient administrative shires of Cornwall, in the United Kingdom. Kerrier (sometimes Kirrier) is thought by Charles Thomas to be derived from an obsolete name (ker hyr = long fort) of Castle Pencaire on Tregonning Hill, Breage. It is likely that an even earlier name for the district was Predannack which has been displaced by the Lizard Peninsula as a geographical name.