Genesis 21:3

Genesis 21:3, in plain English

Abraham names his newborn son Isaac, which means 'he laughs' or 'laughter.' This name carries the whole story of how Sarah laughed in disbelief when God promised her a son, and how that laughter will soon turn into joy.

Why it's here

Naming a child in the Bible wasn't just about preference—it was about identity and destiny. Isaac's name is a reminder of the impossible thing God just did. When you hear 'Isaac,' you're hearing the laughter of faith vindicated. There's something beautiful about how the family would say this name and remember: even when we don't believe, even when we laugh in doubt, God can turn our skepticism into celebration.

Who's speaking

The narrator simply records Abraham's action.

Where it sits in the story

Isaac means 'laughter,' and his entire life will be about God keeping promises that seem laughable to human logic. His descendants—all of Israel—carry forward the legacy of trusting a God who does impossible things.

The scholarly reading

Abraham names his newborn son Isaac, fulfilling God's earlier directive and establishing his paternal authority and covenant participation through the act of naming.

Language and setting

Naming in ancient Near Eastern culture, particularly in the biblical text, is not incidental; it reflects the namer's authority and forecasts the named one's destiny. Abraham's act of naming Isaac (Yitsḥāq, יִצְחָק—'he laughs') directly correlates with the laughter motif that will dominate the following verses and recalls Sarah's incredulous laughter in Genesis 18:12.

Voice

The narrator, documenting Abraham's covenant action

Significance

This simple act completes Abraham's role as patriarch and covenantal agent. The name itself becomes a permanent marker of the promise's absurdity—that God would grant a son whose very name commemorates the human impossibility of the thing promised.

1Now the LORD attended to Sarah as He had said, and the LORD did for Sarah what He had promised.

2So Sarah conceived and bore a son to Abraham in his old age, at the very time God had promised.

3And Abraham gave the name Isaac to the son Sarah bore to him.

4When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.

5Abraham was a hundred years old when his son Isaac was born to him.

Read all of Genesis 21 — The promised son arrives — and Sarah laughs again, this time with joy. But the arrival of one son means the departure of another.