There were twelve stones, one for each of the names of the sons of Israel, each engraved like a seal with the name of one of the twelve tribes. (NIV)
There were twelve stones with their names according to those of the sons of Israel, engraved like a signet, each with its name, according to the twelve tribes. (AMP)
And the stones were according to the names of the children of Israel, twelve, according to their names, like the engravings of a signet, every one with his name, according to the twelve tribes. (KJV)