also: ギリシアじん
Greek person
Refers to a person from Greece. Neutral term; no special register.
He is Greek.
あのギリシャ人は日本語が上手だ。
That Greek person is good at Japanese.
Compound of ギリシャ (Greece) + 人 (person). ギリシャ is a loanword from Portuguese 'Grécia' or Dutch 'Griekenland', adapted into Japanese.