translating Old Norse Groenland, so named by its discoverer (986 C.E.) because "it would induce settlers to go there, if the land had a good name":

Hann gaf nafn landinu ok kallaði Groenland, ok kvað menn þat myndu fysa þangat farar, at landit ætti nafn gott. [ Islendingabok , 1122-1133]

See green (adj.) + land (n.). Related: Greenlander; Greenlandish.