Which prophet fled to Egypt but was brought back and killed by King Jehoiakim?

Answer: Uriah son of Shemaiah

Uriah son of Shemaiah from Kiriath-jearim (KJV: Urijah) prophesied as Jeremiah did, fled to Egypt, and was brought back and put to the sword.

“Now there was another man prophesying in the name of the LORD, Uriah son of Shemaiah from Kiriath-jearim. He prophesied against this city and against this land the same things that Jeremiah did.”— Jeremiah 26:20 (BSB)