I am not researching this family, just entering information from one of my books "Pioneers of Old Monocacy" by Tracey & Dern:
Heinrich Sinn came to this country from Germany on the Johnson Galey, a pink registered in London, which had sailed from Rotterdam by way of Beal in England.He arrived at Philadelphia on September 18, 1732 and ualified with the usual oaths the next day.With him came his wife Katharine and a daughter Anna, as well as Johann Georg Gump, Johann Peder Schmitt and some 325 others. Though Stover indicated in his Journal that Heinrich Sinn was living in 'Manaquesen' in 1735, it is probable that the move there came sometime between 1736 and 1739.An entry for the baptism of Sinn's daughter Susanna on March 30, 1735 appears in both his personal Journal and the Lancaster Trinity Luther Church Book, but witnesses and other baptisms the same day did not involve Monocacy settlers.Further, in 1736 a son Philip Henry Sinn was baptized at the Lancaster Reformed Church.it was not until June 17, 1739 when a son Jacob Matthias Sinn was baptized that we can be confident the family had reached Monocacy.This was the last entry Stover made for 'Henrich Sinn of Monoquesen,' and all others present that day were from Monocacy.Jaboc Mattheis Mansser was the sponsor."
"Henrich Sinn's land, called 'Loom,' was a thin, narrow 125 acres triangle squeezed between the lands of Caspar Myer and Henry Brunner.Sinn received title to the land from Daniel Dulaney on July 28, 1746.The 1740 agreement to manage 'Jacob's Fortune' while its owner Jacob Manser was off fighting with the King's forces in the West Indies suggests that Sinn might then have been in the area near present-day Lewistown.Nevertheless he was a contributor to the purchase of the Lutheran church book about 1742, and in it are entries recording the baptism of his daughters Maria Catharina in 1741 and Maria Barbel in 1743.Henry Sinn was still living on 'Loom' when he dictated his will on March 7, 1770.In that will, he named his wife Catharine and devised his land on 'Tasker's Chance' to his son Philip Henry Sinn.The latter was to make compensating payments to his brother Jacob Sinn and his four sisters, Susanna Pickenpaw (wife of Johann Caspar Beckenbach), Barbara Michael, Catharine Fout and Margaret Cronin.It is of interest that Philip Henry Sinn seems to have changed the family's religious affiliation from Lutheran to Reformed, for in 1756 his name appeared on the Frederick Reformed church constitution prepared by Pastor Johann Conrad Steiner."
There were some other listings on this name in the index.The book can be purchased from the Frederick County Historical Society, Church St.