English 'Egypt' comes via Latin and Greek from Egyptian Hwt-ka-Ptah, the name of the great temple of Ptah at Memphis — a single temple's name became the foreign name for an entire civilization.
A country in northeastern Africa, home to one of the earliest and most enduring civilizations in human history.
English 'Egypt' derives via Latin 'Aegyptus' from Ancient Greek 'Aigyptos' (Αἴγυπτος). The Greek name is generally traced to Egyptian 'Hwt-ka-Ptah' (ḥwt-kꜣ-ptḥ), meaning 'House/Temple of the Ka (spirit) of Ptah' — one of the names for Memphis, the ancient capital and its temple. The name of a single temple thus came to denote the entire country in foreign languages. The Egyptians themselves called their country 'Kemet' (kmt), meaning 'the Black Land', referring to the fertile black soil deposited
Egypt is named after a single temple. The Greek name Aigyptos derives from Hwt-ka-Ptah, the great temple of the god Ptah at Memphis. It would be as if all of England were called 'Westminster' by foreigners. The word 'Copt' and 'Coptic' are further contractions of the same word — Aigyptos → Qibt → Copt.