There is a Peter Lepard that is looks close to what you are looking for in my tree. According to the records I have (I intend to go looking for him in the 1851 and 1871 Canada Census tonight), he was born in 1807 and died in 1871, probably in what is now East Gwillimbury Ontario which is near Newmarket. Be married Phoebe Draper in 1831. She as well as many (but not all) of the children were found in Northwestern Michigan by the turn of the 20th century.
Peter's parents were Abraham Lepard and Joanna Hannah.
Most of my records now is circumstantial evidence but I plan on putting together more evidence in the coming year. Based on the evidence I have right now, Abraham was probably born between 1775 and 1781 in Mendham, Morris, New Jersey. The family moved to Greenwood, Northumberland, PA around 1790. I think Abraham would have married Joanna there prior to moving to East Gwillimbury around 1801. I also think Abraham's father is John Lepard.
My sources so far are:
1) Affidavit given by John, Abraham, and Jacob Lepard for Mary Locee to prove marriage to Peter Emery so that Mary could obtain a pension for Peter's Revolutionary War Service. Peter is said to fought in the VA militia and made similar moves as the Lepards
2) 1790 US Census - John Lepard with 1 male over 16, 4 males under 16 and 4 females is listed in Northumberland County PA on Page 47. Peter Emery is listed in page 22
3) 1800 US Census - The Lepards are listed as Leppands and include about 4 - 5 of them. The oldest being a John Leppand. Peter Emery is listed in the same township. The census was in ABC order that year. All but Henry Lepard are listed in Greenwood, Northumberland, PA. Henry is listed in Derry, Northumberland, PA.
Greenwood is now in Columbia County.
Also, do not get too hung up on spelling as others have suggested. I have found 4 variations already and expect to find more. Most of the Lepards could not read or write so expect phonetic variations too.