Pacificus is the name of multiple persons: Pacificus of Verona (–844), a 9th-century Carolingian Italian religious leader Pacificus (died 1234), a disciple of St. Francis of Assisi Pacificus of San Severino (1653–1721), the seventeenth-century saint Pacificus was a pen name of Alexander Hamilton (1755 or 1757–1804)