American Standard Version
and knew her not till she had brought forth a son: and he called his name JESUS.

Amplified® Bible
But he had no union with her as her husband until she had borne {her firstborn} Son; and he called His name Jesus.

Contemporary English Version
But they did not sleep together before her baby was born. Then Joseph named him Jesus.

Darby English Version
and knew her not until she had brought forth her firstborn son: and he called his name Jesus.

Good News Bible
But he had no sexual relations with her before she gave birth to her son. And Joseph named him Jesus.

International Standard Version
He did not have marital relations with her until she had given birth to a son; and he named him Jesus.

King James Version
And knew her not till she had brought forth her firstborn son: and he called his name JESUS.

New American Standard Bible
but kept her a virgin until she gave birth to a Son; and he called His name Jesus.

New International Version
But he had no union with her until she gave birth to a son. And he gave him the name Jesus.

New King James Version
and did not know her till she had brought forth her firstborn Son. And he called His name JESUS.

N.A.S.B. in E-Prime
but kept her a virgin until she gave birth to a Son; and he called His name Jesus.

Young's Literal Translation
and did not know her till she brought forth her son -- the first-born, and he called his name Jesus.

New English Translation
but did not have marital relations¹ with her until she gave birth to a son, whom he named² Jesus.