GOD'S WORD® Translation
They thought that he was with the others who were traveling with them. After traveling for a day, they started to look for him among their relatives and friends.

American Standard Version
but supposing him to be in the company, they went a day's journey; and they sought for him among their kinsfolk and acquaintance:

Berean Study Bible
Assuming He was in their company, they traveled on for a day before they began to look for Him among their relatives and friends.

Douay-Rheims Bible
And thinking that he was in the company, they came a day's journey, and sought him among their kinsfolks and acquaintance.

English Revised Version
but supposing him to be in the company, they went a day's journey; and they sought for him among their kinsfolk and acquaintance:

King James Bible
But they, supposing him to have been in the company, went a day's journey; and they sought him among their kinsfolk and acquaintance.

World English Bible
but supposing him to be in the company, they went a day's journey, and they looked for him among their relatives and acquaintances.

Young's Literal Translation
and, having supposed him to be in the company, they went a day's journey, and were seeking him among the kindred and among the acquaintances,

Luke 2:44 Additional Translations ...