Erasmus \e-ras-mus, er(a)-smus\ as a boy's name is of Latin and Greek origin, and the meaning of Erasmus is "to love". Latin form of the Greek Erasmos. Saint Erasmus was a saint popularly known as Saint Elmo. The 16th-century Dutch humanist philosopher Geert Gerts wrote as Desiderius Erasmus (Desiderius is the Latin form of Erasmus.)
For more information, see also the related name Rasmus.
A baby name that sounds like Erasmus is Arsemio.