Tiago is a Portuguese masculine given name, equivalent to the English James. It originated as a back-formation from Santiago, the Spanish and Portuguese name for Saint James. In medieval times, Santiago was understood as San Tiago (Saint James), leading to the independent use of Tiago as a short form. This pattern parallels the formation of other names derived from titles of saints. The name is attested as early as 1681 in Almeida's Portuguese Bible, though at that time the Apostle was still referred to as Jacobo in the body text; Tiago appeared only in the book title. Etymology Tiago ultimately traces back to the Hebrew name Yaʿaqov (Jacob), which through Latin and Greek evolved into Iacomus and then James. In Portuguese, the name followed a unique path: the phrase São Tiago (Saint James) was contracted from Santo Iago, and later the prefix São was dropped, leaving Tiago as a standalone given name. This process made Tiago a doublet of other Portuguese forms such as Diogo and Jaime, all of which share the same ultimate origin. The variant Thiago (with an th spelling) is common in Brazilian Portuguese, reflecting the historical pronunciation. Cultural and Religious Significance Tiago is intimately linked to Saint James the Greater, one of the twelve apostles and the brother of John. In Portuguese-speaking countries, the name has been popular due to the cult of Santiago de Compostela, though Tiago itself became widely used as a given name after the Middle Ages. It is borne by numerous notable individuals across the Lusophone world, from sports figures such as Tiago Mendes (Portuguese footballer) to historical personalities like Tiago Barbosa (17th-century writer). The name's popularity continues today in Portugal, Brazil, and other Portuguese-speaking communities. Notable Bearers +Tiago Splitter, Brazilian basketball player +Tiago Monteiro, Portuguese racing driver +Tiago (Tiago Cardoso Mendes), Portuguese footballer + Origin: Portuguese, derived from Hebrew 'Yaʿaqov' via Latin 'Iacomus' Meaning: Supplanter (from Jacob); also a form of James Usage: Portuguese, Galician Related Names: Thiago (variant), Diogo, Jaime, Santiago, Diego (Spanish)