Stephen Cornfoot was a student, began attending Hogwarts School of Witchcraft and Wizardry in 1991 and was sorted into Ravenclaw House. However, it is highly likely that Cornfoot is actually a member of Hufflepuff. This is because there are already five other boys in Ravenclaw, and four of them have made canon appearences (Micheal Corner, Anthony Goldstein, and Terry Boot). Either he or Kevin Entwhistle are one of the two unknown members of Hufflepuff, seeing as though we have a full boys dormitory in all the other houses, but there are only five boys in each house in the first-year class of 1991.
The name "Stephen" is from the Greek name Στεφανος (Stephanos) meaning "crown". Saint Stephen was a deacon who was stoned to death, as told in Acts in the New Testament, and he is regarded as the first Christian martyr. Due to him, the name became common in the Christian world. It was popularized in England by the Normans.