Feminine of Augustine, from Latin 'augere' meaning to increase or be majestic.
Augustina is the feminine form of Augustine, which descends from the Latin Augustus — a title meaning the exalted one, the venerable, the great. Augustus was the honorific granted to Rome's first emperor, Gaius Octavius, by the Senate in 27 BCE, and from that moment forward it carried the full weight of Roman imperial legitimacy. The name Augustine absorbed that gravitas while simultaneously acquiring profound theological associations through Saint Augustine of Hippo (354–430 CE), whose Confessions and City of God shaped Western Christian thought more deeply than almost any other writer after Paul.
The feminine Augustina has its own history of formidable bearers. Agustina de Aragón (1786–1857), the Spanish artillery hero of the Siege of Zaragoza during the Napoleonic Wars, became one of Spain's most celebrated military figures — she stepped over fallen soldiers to fire a cannon after her unit was decimated, and her image was painted by Francisco Goya. Augustina of Austria carried the name through Habsburg dynastic history.
The name was used across the Catholic world — Spain, Portugal, Italy, Latin America — wherever the church's naming traditions ran deep. In contemporary use, Augustina has the qualities that draw parents to long, classical feminine names: it is impossible to abbreviate into blandness (Augusta, Gusta, Tina all remain options), it carries genuine historical weight, and it is rare enough in English-speaking countries to feel distinctive without being invented. It belongs to the same family of grand, slightly maximalist names as Seraphina, Wilhelmina, or Valentina — names that are not trying to be subtle and are richer for it.