German Swiss Mennonite immigrants, 1700's, Hartman Hunsaker, 27 Jan 1690, [Bern, Switzerland-1733 Pennsylvania].and his wife Anna Stirtz, Firstly I researched the family name origin, for Stirtz then Swirtz, found no Known origin. Referred to Ancestry records found Anna Schultz (Stirtz), [1694 Zatzbach, Bern, Switzerland 1738 Manheim, Lancaster, Pennsylvania]. Their marriage year is 1712, and ended in 1733, 21 years the number of children vary from 8 to 12. In that time?: in 1734 Anna married Jacob Gochnour 1693 Germany, 11 November 1758. Manheim, Lancaster, Pennsylvania, Anna is credited with having a further 15 children? She died in 1738. (To many children not enough wives)
Checked surname Schultz, Meaning: One who was a Magistrate, a Sherriff, a Steward an overseer.
Also checked Hunsaker, Meaning: one who came from or lived nearby Hunziker. Their children 8 in number, born between 1712 and 1733,
Could Stirtz be a phonetic spelling by an English or Scottish seaman, That is where the cargo ships originated from.