Konstantius as a Baby Name. Meaning and Origin of Konstantius

What is the meaning of the name Konstantius ?

The baby name Konstantius is a Male name , 4 syllables long and is pronounced {'IPA': '/kɒnˈstæn.ti.əs/', 'respelling': 'kon-STAN-tee-us'}.

Konstantius is Latin in Origin.

Konstantius derives from Latin Constantius, a derivative of constans (“steadfast, firm”), sharing roots with Constantinus (source of English Constantine). The initial K reflects Central and Eastern European transliteration habits and modern onomastic taste, though the classical spelling uses C. As a virtue-tinged name, it conveys constancy, reliability, and faithfulness.

Usage is anchored in Late Antiquity: Constantius I (Chlorus), father of Constantine the Great; Constantius II, a 4th‑century emperor; and the brief Western ruler Constantius III, as well as several bishops venerated as saints. International variants include Constantius/Constantinus (Latin), Constantine (English), Konstantinos or Konstantios (Greek), Konstantin/Konstanty (Slavic and Polish), Constantijn (Dutch), Constant or Constantin (French and Romanian), Costanzo (Italian), Constancio (Spanish), Constâncio (Portuguese), and Costin (Romanian). Diminutives span Kostya, Kosta, and Costa. Today Konstantius is rare and scholarly, encountered in ecclesiastical contexts, historical fiction, or families seeking a dignified, pan‑European classic with a resolute meaning.

⚙ We have no record of Konstantius in any national birth registry or name dataset. That's typically a sign of a rare name, a regional or traditional one, or a modern coinage. Either way, it remains a genuinely rare choice.