Costi as a Baby Name. Meaning and Origin of Costi

What is the meaning of the name Costi ?

The baby name Costi is a Male name , 2 syllables long and is pronounced KOS-tee (Romanian: /ˈkosti/; English approximations: /ˈkɒsti/ or /ˈkoʊsti/).

Costi is Romanian in Origin.

Costi is a Romanian diminutive and stand‑alone given name derived from Constantin, ultimately from Latin Constantinus, the imperial name formed from constans “steadfast, firm.” Through the prestige of Constantine the Great and later Orthodox saints and rulers, forms of the name spread throughout the Balkans and Eastern Europe. In Romania, Costi functions as a familiar call name that often appears on birth certificates, and its bearers commonly celebrate the 21 May name day of Saints Constantine and Helena.

Closely related forms include Romanian Constantin, Costin, Costel, Costică, Costea, and Costinel; comparable variants elsewhere are Greek Kostis and Kostas, South Slavic Kosta, Russian Kostya, and Italian Costantino. Feminine counterparts are Constantina and Constance (Romanian Constanța). The core meaning centers on constancy - steadfastness, reliability, and faithfulness - qualities that have sustained the name’s popularity in Orthodox cultures and among diasporic communities.