Nicolas Grimmett was a student who began attending Hogwarts School of Witchcraft and Wizardry between 1987 and 1989. By the 1993-1994 school year, he had been made a Prefect, and was tasked with patrolling areas of the school off limits to students.
Nicolas traces back to Greek nike,which means "victory of the people".
Grimmet could come from the English word grim,which means "serious,cold,uninviting" . This is shown to be a characteristic of many Prefects.
- Harry Potter and the Prisoner of Azkaban (video game) (PS2 version only)