onomasti
21
May

Konstantinos

Κωνσταντίνος

Constantine, in English

Saints Constantine and Helen — honoured together as Equals-to-the-Apostles.

Origin

The story of Konstantinos

Konstantinos keeps 21 May — Saints Constantine and Helen, honoured together by the Church as Equals-to-the-Apostles.

The name is Latin in origin: Κωνσταντῖνος answers the Latin Constantinus, a pet form of the names Constans and Constantius — both meaning “constant, steadfast.”

“The steadfast one.”

onomasti · Konstantinos

Key facts

Konstantinos at a glance

Name day
21 May
This year · 2026
Thursday, 21 May
Next year · 2027
Friday, 21 May
Meaning
Κωνσταντῖνος — from Latin Constantinus, a pet form of Constans and Constantius, “constant, steadfast”
Patron of
Saints Constantine and Helen, Equals-to-the-Apostles

Make it yours

Learn Konstantinos

Say it

Κωνσταντίνος

The accent shows the stress — your voice lifts on the highlighted letter.

In English letters: Konstantinos · Constantine · Costas · Gus

Write it

Κωνσταντίνος

Copy it and paste it anywhere you can’t type Greek — a text, a card, a cake.

Tell the kids

Pass it on. Tell them whose name they carry — and that this day is theirs to keep.

Χρόνια Πολλά

Send Konstantinos a Χρόνια Πολλά

Χρόνια Πολλά Κωνσταντίνος 21 Μαΐου onomasti

A name day matters more than a birthday in a Greek family — and everyone sends Χρόνια Πολλά. Here is a card to send, and the correct Greek to write, whether or not you can type it yourself.

Warm — someone close

Χρόνια πολλά!The everyday wish — “many years”.
Να τα εκατοστίσεις!“May you live to a hundred” — the traditional wish, to someone close.

Formal — an elder, or with respect

Χρόνια πολλά και ευτυχισμένα!A fuller, warmer wish — “many years, and happy ones”.
Να τα εκατοστίσετε!“May you live to a hundred” — with respect, or to more than one person.

The card and the wishes are in Greek — the way you would actually send them. We never machine-translate; these are fixed, correct greetings, and the name is woven in only where Greek grammar lets us do it without guessing.

Variations

Forms & nicknames of the name

One name takes many forms — the formal, the everyday, the affectionate, and the spellings that travelled abroad. Each has its own page here, and all share the same day.

English & romanised

Know another form?

Missing a form your family uses? Add it — a person reviews every submission before anything is published.