Konstantinos has roots in ancient Greece and Rome. Derived from the Latin Constantinus and the Greek Κωνσταντίνος, the name means “steadfast” or “constant.” It recalls Emperor Constantine the Great, who founded Constantinople in 330 CE and established Christianity within the Roman Empire, as well as Saint Constantine of Cappadocia, venerated as a martyr. In modern Greece it remains common; abroad—particularly in the United States—it appears less often but shows steady usage: in 2024, 48 newborn boys bore the name, ranking 876th nationally after rising from 904th in 2022. With its classical resonance and dignified cadence—pronounced kawn-STAHN-tee-nos (/kɔnstɑnˈtinɔs/)—Konstantinos offers parents a direct link to early imperial history and enduring cultural heritage.
| Konstantinos Karamanlis was a Greek statesman who served four times as prime minister and twice as president of Greece. |
| Konstantinos Mitsotakis was a Greek liberal politician who served as prime minister from 1990 to 1993. |
| Konstantinos Stephanopoulos - Kostis Stephanopoulos was a Greek conservative politician who served as president of Greece from 1995 to 2005. |
| Konstantinos Moschopoulos was a distinguished Greek army officer in the Balkan Wars who later served as Chief of the Hellenic Army General Staff. |
| Konstantinos Filippidis is a Greek former pole vaulter who won gold at the 2014 World Indoor Championships. |
| Konstantinos Dimitriou is a Greek professional footballer who plays as a centre-back for PAS Pyrgos. |
| Konstantinos Nazis, born Konstantinos Anastasiadis, is a Greek singer. |
| Konstantinos Asopios was a 19th-century Greek scholar and teacher from Epirus. |
| Konstantinos Tsaldaris was a Greek politician who served twice as Prime Minister of Greece. |
| Konstantinos Tsiklitiras - Kostis Tsiklitiras was a Greek athlete and Olympic champion. |
| Konstantinos Konstantopoulos was a conservative Greek politician who briefly served as Prime Minister of Greece. |
| Konstantinos Papadakis is a Greek politician elected to the European Parliament in 2014 for the Communist Party of Greece. |
| Konstantinos Damianos was a senior Greek army officer who fought in the Balkan Wars of 1912-1913. |
| Konstantinos Andriopoulos was a Greek football goalkeeper. |