onomasti
13
Dec

Isaac

A form of Isaak

Isaak, in English

the Righteous Patriarch Isaac, son of Abraham — kept on 13 December.

It keeps the same day as the name it comes from — everything below is that name’s.

Origin

The story of Isaak

Isaak keeps 13 Decemberthe Righteous Patriarch Isaac, son of Abraham.

Ἰσαάκ is the Hebrew Yitzhaq“he will laugh,” the laughter of Sarah at the promise of a son.

“He will laugh.”

onomasti · Isaak

Key facts

Isaak at a glance

Name day
13 December
This year · 2026
Sunday, 13 December
Next year · 2027
Monday, 13 December
Meaning
Ἰσαάκ — “he will laugh”
Patron of
the Righteous Patriarch Isaac, son of Abraham

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.

Greek forms

English & romanised

Isaak you are hereIsaac

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