Marriage of Jean Pierre Keller fils & Marie Percle. The marriage record of the eldest child of Jean Pierre & Catherine Haron gives his own place of birth as "Rochetarque, province of Strasbourg," so his parents were most likely married in Alsace.
Burial of Pedro Keler. The burial record of Jean Pierre Keller fils gives his age at death in 1798 as 50 years. This would establish an earliest date for his parents' marriage at c.1748, when his father would have been about 17 years old. If the record overstates the son's age, his parents' marriage could have taken place as late as c.1759.
