It keeps the same day as the name it comes from — everything below is that name’s.
Key facts
Isaak at a glance
Name day
13 December
This year · 2026
Sunday, 13 December
Next year · 2027
Monday, 13 December
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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