St. Elmo 's fire is named after St. Erasmus of Formia ( also called St. Elmo , one of the two Italian names for St. Erasmus , the other being St. Erasmo ) , the patron saint of sailors .
St. Elmo 's fire is named after St. Erasmus of Formia . Elmo ( and Erasmo ) is the Italian name for St. Erasmus , the patron saint of sailors .