Rowena Ravenclaw is a character in the books about Harry Potter written by J. K. Rowling. In the books Rowena Ravenclaw was a witch in the 10th century who was one of the four people who started Hogwarts School of Witchcraft and Wizardry. She also started Ravenclaw House, which is one of the four groups of students called "Houses" at Hogwarts. Each student in the school is in one of the four Houses and each House has its own dormitory where the students in that House live.
In the fourth book about Harry Potter, Harry Potter and the Goblet of Fire, the Sorting Hat sings a song about the four people who started the school. In the song it says that Rowena Ravenclaw was from a glen. Glen is a word that means a narrow valley in Scotland, so this tells us that Rowena Ravenclaw was from Scotland.