Tércia

Tércia is a Portuguese feminine given name, ultimately derived from the Latin Tertius, meaning "third." In ancient Rome, Tertius was used both as a praenomen (a personal name) and a cognomen (a family or nickname), often given to a third child. The name appears in one of the most notable ways in the Christian New Testament: in Paul's Epistle to the Romans (Romans 16:22), a person identified as Tertius is described as having penned the letter at the apostle Paul's dictate. This connection gives the name a subtle religious significance for those familiar with the biblical context.

While Tertius and its forms remained largely dormant as first names for centuries, Tércia arose as a French/Portuguese adaptation of Tertia, the feminine form of Tertius in Latin. Among Portuguese-speaking cultures, Tércia is not especially common but favors Catholic and intellectual families or individuals who engage thoroughly with onomastics and history. Many figures possess a historical and literary nuance: they can be dated to the spread of neoclassical naming practices that briefly revived ancient Latin names in early modern and modern periods.

Indeed, while the root Tertius and relational Tertia appear more predominantly in ancient populations, the variant Tércia continued even in early modern settings ranging across Portugal to northeast Brazil, where similar naming conventions are preserved in ecclesiastical parishes. Its affinity for combination with longer compound phrases—for example in a complete Catholic full name with multiple given—marks this as a near liturgical sounding path, plus the ultimate marker of birth order so recognizable to families.

• Meaning: "Third"
• Origin: Latin
• Type: Feminine given name
• Usage regions: Portuguese-speaking world: Portugal, Brazil (/glossary area list of Europe and Americas)