Spanish form of Isidore, from Greek meaning 'gift of Isis'; patron saint of Madrid.
Isidro is the Spanish form of Isidore, derived from the Greek "Isidoros" — a compound of "Isis," the Egyptian goddess of magic and motherhood, and "doron," meaning gift. The name thus carries the meaning "gift of Isis," a remarkable etymology that preserves the memory of Egypt's spiritual influence on the ancient Greek world. The name was borne by Saint Isidore of Seville (c.
560–636), the encyclopedist and Archbishop who compiled the "Etymologiae," a vast attempt to preserve all of Roman knowledge — a work so influential in medieval Europe that Pope John Paul II named him the patron saint of the internet in 1997. In Spain, however, the name belongs most viscerally to San Isidro Labrador (Saint Isidore the Farmer), a twelfth-century Madrid peasant canonized in 1622 alongside Teresa of Ávila and Ignatius of Loyola. His feast day, May 15, is Madrid's most important civic festival — a week of corridas, concerts, and processions that transforms the city annually.
San Isidro is the patron not only of Madrid but of farmers across the Spanish-speaking world, giving his name a earthy, humble dignity that contrasts with its regal Egyptian etymology. Isidro has remained in steady if modest use throughout Latin America and Spain, particularly in rural communities where the agricultural saint's patronage still resonates. In the United States it sits within the broader tapestry of Spanish heritage names experiencing renewed appreciation. It offers the warm nickname Issi or the more vernacular Chidro in Mexican Spanish — a name that carries centuries of faith, scholarship, and honest labor within its four syllables.