The name
Clackmannan may be of
Brittonic origin. The first element is probably
*clog, meaning "rock, crag, cliff" (cf.
Welsh clog, Gaelic
clach), and the second is the regional or ethnic name
Manau, seen also in Slamannan (Sliabh Mhanann) and possible Dalmeny (though in Gaelic this is Dùn Mheinidh). The name comes from the root
man- meaning "projecting" and may have ties to the Celtic deity
Manannán. The name of the town has been said to allude to the Stone of Manau or Stone of Mannan, a pagan monument that can be seen in the town square beside
Clackmannan Tolbooth, which dates from 1592. A crater on
asteroid 253 Mathilde is named after Clackmannan. Because Mathilde is a dark,
carbonaceous body, its craters have been named after famous coalfields from across the world. The
Clackmannan Group is the name given to a suite of rocks of late
Dinantian and
Namurian age laid down during the
Carboniferous period in the
Midland Valley of Scotland. == History ==