What can erasmus be called a humanist?

He was a dutch writer and was the greatest scholar of the norther hemisphere

The Church Father Jerome (c. 347–420) was Erasmus’s role model, not only because of his interests as a theologian and a scholar, but also for the way in which he was portrayed. In the 15th and 16th centuries, Jerome’s portraits came to signify the ideal scholar. 
Erasmus is a classical humanist: Someone who studies language, literature, history, and moral philosophy.