His father was probably Jacob Shock.His wife's father was Erasmus Holtzapfel who came to America in 1731 on the ship Britannia. He sailed from Rotterdam to Philadelphia. Erasmus' age is listed on ship's list as 20. The ship list contains 269 people in 106 families. Port clearance mentions 21 Sept 1731 as approximate date of arrival. More information can be found in books on emigrants to America from Germany in the period 1700-1750.Sorry to be so lacking in specifics, but my files are unorganized at the moment and I can't find what you need.Also, there is family history for this person on the Internet because I remember downloading it 3 years ago.Some of Henry's family stayed in Virginia/WVa. while others went to Ohio, Indiana and Iowa.there are many Shocks in the Dayton, Ohio area.