Actually, I goofed. My Abraham Lebeau would have been born ca. 1640 - don't have a location. His son John (Jean) Lebeau (Lebo) was born about 1683 -probably in Alsace, and married Judith Hanotiaux (born London, England before 1690) about 1705. Their son John Abraham (Lebo spelling?) was born about 1708 in Palatinate (Alsace, Germany), and apparently they immigrated together to Berks County, PA. John (Johan) Abraham had a son Johan (John) Adam LEPPO (b. 1753), who had a son Simon (b. 1795), whose son Simon Petrus (b. 1830, Simon Peter LEPPO), had Ezra Arba (AKA Izri Arbra) LEPPO (b. 1858), my great-grandfather. His son David Elmer Leppo was my grandfather, and his son Melvin Edgar Leppo was my father.
The connections between the Lebeau, Lebo, and Leppo spellings apparently bounced around a bit, as did Johan and John for first names. Most of the stuff I found has Lebeau becoming Lebo with Abraham's son John. After that it seems to stay as Lebo except for a few references to records spelling it Leppo. In my line, it looks like the change to Leppo was with John Adam Leppo, or his son Simon. Some of the records I turned up online missed the second marriage of Johan Abraham to Mary Schreiver, which was my branch and led to the Leppo spelling in our particular line, although it appears that the same spelling changes turned up in other Lebo/Leppo lines.
I'd sure be interested in going farther back than Abraham Lebeau, but my trail seems to go cold there - barring a trip to France or turning up other records online.
Best of luck in your search, Al !