But we know him and where he is from. And when the Christ has arrived, no one will know where he is from.
Other versions
King James Version
Howbeit we know this man whence he is: but when Christ cometh, no man knoweth whence he is.English Standard Version
But we know where this man comes from, and when the Christ appears, no one will know where he comes from."New International Version
But we know where this man is from; when the Christ comes, no one will know where he is from."