It is usually just: "The name of my school is ...", but if your school was founded by a noble person and it carries his name then you can say: "The school, which I attend named after ..."
It is usually just: "The name of my school is ...", but if your school was founded by a noble person and it carries his or her name then you can say: "The school which I attend is/was named after ..."
I don't think many people would bother to point out that their school was named after someone in such a way. You might say "I go to Yehudi Menuhin School, named after the famous violinist" but only if you think the listener would be interested in such information.