Morgil Hastwyck

Ser Morgil Hastwyck was a knight of House Hastwyck during the reign of Aegon IV Targaryen.

Biography
Ser Morgil was incited by King Aegon to slander Queen Naerys, accusing her of adultery with her brother Aemon the Dragonknight, a famous knight of the Kingsguard. Prince Aemon defended the queen's honor by defeating and killing Ser Morgil in a trial by combat.

In the books
In the A Song of Ice and Fire novels, Morgil's story is the same. His name is erroneously spelled as "Morghil" in A Feast for Crows, Chapter 43.