Emmanuel--spelled with one or two 'm's'-- was popular with early Jewish immigrants, until overused nickname Manny caused it to fade. Now, this important biblical name is being revived in its full glory. In 2013, Emmanuel was Number 171, spelled Emanuel it was 322.
In the Bible, this is the name given to the promised Messiah, in the prophecy of Isaiah.
The name is popular in Spain as Manuel; the name of the German philosopher is spelled Immanuel Kant.