Wykehamist
Concise Oxford English Dictionary © 2008 Oxford University Press:
Wykehamist /ˈwɪkəmɪst/
▶noun a past or present pupil of Winchester College in England.
– origin C18: from mod. L. Wykehamista, from the name of William of Wykeham (1324–1404), founder of the college.
'Wykehamist' also found in these Oxford entries:

