GOD'S WORD® Translation
When Peter realized what had happened, he went to the home of Mary, the mother of John Mark. Many people had gathered at her home and were praying.

American Standard Version
And when he had considered the thing , he came to the house of Mary the mother of John whose surname was Mark; where many were gathered together and were praying.

Berean Study Bible
And when he had realized this, he went to the house of Mary the mother of John, also called Mark, where many people had gathered together and were praying.

Douay-Rheims Bible
And considering, he came to the house of Mary the mother of John, who was surnamed Mark, where many were gathered together and praying.

English Revised Version
And when he had considered the thing, he came to the house of Mary the mother of John whose surname was Mark; where many were gathered together and were praying.

King James Bible
And when he had considered the thing, he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.

World English Bible
Thinking about that, he came to the house of Mary, the mother of John whose surname was Mark, where many were gathered together and were praying.

Young's Literal Translation
also, having considered, he came unto the house of Mary, the mother of John, who is surnamed Mark, where there were many thronged together and praying.

Acts 12:12 Additional Translations ...