Cotatre, Cotovatre, Scottewatre

The town, and possibly a lake, of the smith Trebuchet in Chrétien de Troyes’s Perceval. Perceval had to travel there to repair the Grail Sword.

It becomes a castle in the Fourth Continuation of Perceval and a kingdom in Girart d’Amiens’s Escanor. R.S. Loomis and D.D.R. Owen identified it with Firth of Forth, called in medieval times "Scottewatre", indicating the Firth of Forth - an identification Cline clearly accepts, for he does not even use the name "Cotoatre", simply calling Trebuchet's home area the Firth of Forth.