Based on sempaiscuba's answer, Julien PAUDOIS is most likely:
Julien Joseph Emile PAUDOIS, born in Saint-Mars-la-Jaille (probably what was later turned into "Saint Lagille", as it sounds similar) on the 6th of May 1875, son of Julien PAUDOIS and Joséphine BOSSÉ.
Mishaf is an anglicization of Michov (they are identical when said with the applicable accent), which is the Yiddish name for the town of Michów, about 75mi SE of Warsaw.
When he was born, it was in the Russian Empire, and when he naturalized, it was Poland (and is Poland today)
As you have discovered, it can be tricky to find a person's origin if you only have one document. Your first step should be to find more documents in the US to see if you can get more information. Different documents might give you other clues, either a different spelling of the same name, a different jurisdiction, or a name of a nearby town. When you ...