Governors of North Greenland
Governors of South Greenland
Governor of East Greenland (annexed by Norway in 1932 and named Eric the Red's Land[?].)
Governors of Greenland
For leaders after this see: List of Prime Ministers of Greenland
... merely designated anyone who assumed power for any period of time without a legitimate basis of authority. The first to have the title of "Tyrant" was Pisistratus in 560 ...