Tertuliano / Tertullian

Tertuliano is the Spanish and Portuguese form of the Roman cognomen Tertullianus, which was derived from the Latin word 'tertullus', a diminutive of 'tertius' meaning 'third'. This name was often given to the third-born child in a family, or possibly to someone associated with the number three in some significant way. The most famous bearer of this name was Quintus Septimius Florens Tertullianus, a prominent early Christian author from Carthage, who lived in the late 2nd and early 3rd centuries AD. His writings were highly influential in the development of Western theology.

The name's usage has been primarily concentrated in Catholic countries, particularly in the Iberian Peninsula and Latin America, due to the veneration of Saint Tertullian (though the historical Tertullian was not formally canonized, he was widely respected as a Church Father). While not a common name, it has maintained a consistent, albeit niche, presence over centuries, often chosen for its historical and religious significance.