see www.manxnotebook.com/manxsoc/msvol04/v2p232.htm

The English crown had been in semi-effective control since around 1332
the last King of Man was Magnus (1254-1265)

The Lordship of the Isles was disputed between c.1336 and 1493 by various 'Sciottish' factions - possibly one of these laid claim to the erstwhile capital Mann