Ἰσαάκ (Isaak)
Isaak
Isaac
Quick Reference
- Language
- Koine Greek
- Testament
- New Testament
- Occurrences
- 18 verses
- Root
- —
Word Overview
The name Isaak appears eighteen times in the New Testament, serving as a direct reference to the patriarch Isaac, the son of Abraham and Sarah. The sources note that this Greek form preserves the Hebrew meaning "he laughs," recalling the divine promise that brought laughter to Abraham and Sarah in their old age (Genesis 17:19). While the name itself is simple, its biblical weight comes from the story it represents.
In the New Testament, Isaac is rarely just a historical figure; he is a theological example. He appears in genealogies like Matthew 1:2 to anchor Jesus’ lineage. More significantly, he is cited in Romans 9:10 and Hebrews 11 as an emblem of God’s sovereign choice and faithfulness. The sources highlight that his inclusion often points to the idea that God’s promises are fulfilled not by human effort, but by divine grace.
Translators consistently render this name as Isaac, maintaining continuity with the Old Testament narrative. Its frequent appearance in Hebrews underscores its role in the "hall of faith," where it stands alongside Abraham and Jacob as a witness to trust in God’s unseen promises. The name thus connects the ancient covenant with the new community of believers.
Based on public-domain lexicons (Strong's, Thayer, Gesenius, Brown-Driver-Briggs and others).
What This Word Means for Your Faith
The name Isaak means "he laughs," a reminder of the joy that comes when God fulfills promises that seem impossible to human eyes. In the New Testament, this name carries the weight of divine faithfulness. It is not merely a historical label but a sign that God keeps His word across generations, turning laughter into legacy.
For your faith life, Isaak points to grace rather than effort. Romans 9:7 reminds us that God’s children are counted by promise, not just by natural descent. Similarly, Galatians 4:28 invites believers to see themselves as children of promise, just like Isaac. This means our standing before God rests on His faithful character, not our own achievements.
When you face seasons where hope seems distant, remember the laughter of Abraham and Sarah. God’s timing is perfect, and His promises endure. Rest in the assurance that the same God who sustained Isaac’s lineage is present with you today, working out His good purposes in your life.
How it's translated
How this word is rendered word-by-word in the 18 verses where it appears, by frequency.
- Isaac13×
- of Isaac6×
- Isaac;1×
Forms in the text
The inflected forms of this word as they appear in Scripture, by frequency.
- Ἰσαὰκ19×
- Ἰσαάκ·1×
Key Verses
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Romans 9:7
Neither, because they are Abraham’s offspring, are they all children. But, “your offspring will be accounted as from Isaac.”
This verse clarifies that being a true heir of Abraham depends on God's promise rather than biological lineage alone.
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Galatians 4:28
Now we, brothers, as Isaac was, are children of promise.
Here Paul explicitly identifies believers as children of promise, using Isaac as the primary example of this spiritual reality.
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Hebrews 11:17
By faith, Abraham, being tested, offered up Isaac. Yes, he who had gladly received the promises was offering up his only born son,
This passage highlights Abraham's faith in action by showing his willingness to offer Isaac, trusting God's earlier promises even when they seemed contradicted.
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Matthew 8:11
I tell you that many will come from the east and the west, and will sit down with Abraham, Isaac, and Jacob in the Kingdom of Heaven,
Jesus uses the image of dining with Abraham, Isaac, and Jacob to illustrate the inclusive nature of the Kingdom for all who believe.
Frequently Asked Questions
What does the name Isaak mean?
Why is Isaac mentioned so often in the New Testament?
How is Isaac different from Ishmael in biblical theology?
Does Isaak appear in genealogies?
Every Occurrence (18 verses across 8 books)
Matthew 3 verses
Abraham became the father of Isaac. Isaac became the father of Jacob. Jacob became the father of Judah and his brothers.
Matthew 8:11I tell you that many will come from the east and the west, and will sit down with Abraham, Isaac, and Jacob in the…
Matthew 22:32‘I am the God of Abraham, and the God of Isaac, and the God of Jacob’? God is not the God of the dead, but of the…