Researching Martin Kirstetter (and variations of the name) I found:
Ohio Vital Records #1, 1790s-1870s
Gateway to the West, Volume I, Butler Co., Orphan and Testamentary Records, 1814-1815, Page 155
4-15-1815 John Castator and Peter Sellman appointed guardians of children of Peter Brosius, deceased: Margaret, age 15; John, age 10; Eve, age 8, Daniel, age 6; Elizabeth, age 5; Jonas, age 2.
I didn't record the birth dates that are cited in the above.
Name: Prosius, Maria Margaret Description: Sponsor Event: Baptism Church: Church Records of Stone Valley (Zion's) Lutheran and Reformed Congregations, Lower Mahanoy Township, Northumberland County, Pennsylvania, 1777-1854 Remarks: Sponsors are both single.
For more on Kirstetters and Prosius, see Church Records of Stone Valley (Zion's) Lutheran and Reformed Congregations, LowerMahanoy Township, Northumberland County, Pennsylvania, 1777-1854 in the Genealogy.com Genealogy Library, for one.