Pharaoh (Paroh) פרעה

'Pharaoh' is the title of Egypt's kings, not a personal name. The Torah mentions several:

• The Pharaoh in Avraham's time, who took Sarah and was struck with plagues (Bereishis 12:10–20).
• Yosef's Pharaoh, whose dreams Yosef interpreted and who made him viceroy (Bereishis 41).
• The Pharaoh of the bondage: 'a new king arose over Egypt who did not know Yosef' (Shemos 1:8). He enslaved the Jews and ordered the boys thrown into the river (1:22).

Moshe came to him with 'Let My people go', and Pharaoh refused. Hashem sent the ten plagues and 'hardened Pharaoh's heart' (Shemos 7:3). After the plague of the firstborn he let the Jews go, then chased them; his army drowned in the Yam Suf (Shemos 14).