yeah I forgot the 'e' - spelling never was my forte. I have a German friend by the name of Katharina and as I know no one called Catherine I always get it wrong!
Although if I was being really nitpicky I could point out the lack of apostrophe in your post But then of course I would never do such a thing
St Catz is built on the grounds of Magdalen. This is probably the reason for their rivalry. I'll ask my St Catz neighbour later- but I remember him telling me this.