Berean Study Bible
Although Joseph recognized his brothers, they did not recognize him.

King James Bible
And Joseph knew his brethren, but they knew not him.

American Standard Version
And Joseph knew his brethren, but they knew not him.

Darby Bible Translation
And Joseph knew his brethren, but they did not know him.

Douay-Rheims Bible
And though he knew his brethren, he was not known by them.

English Revised Version
And Joseph knew his brethren, but they knew not him.

Young's Literal Translation
And Joseph discerneth his brethren, but they have not discerned him,