My name is Levy.
Someone I know from France, where we have the same origins, in Alsace / Germany, and profoundly religious and an intellectual, told me that in the Gemara, it is said that after the destruction of the 1st Temple, the Tribe of Levy fled to "Germania."
This would explain our origins also in Alsace, which is know to have a very old tradition of Jews in the area, since the Middle Ages.
Where in the Gemara is this statement about Levy fleeing to Germania?