There is much here Rena which does not make much sense and the following may or may not be of any use to you.
Salem Bocock b.about 1721 Bedford, Bedford, Virginia, USA, d.1783 Bedford, Bedford, Virginia, USA
Salem Bocock's wife was Susannah Bow (or Bowe) b.1720 Bedford, Bedford, Virginia, USA, d.1757 Bedford, Bedford, Virginia, USA.
Some Family Searches also show that he married (unknown spouse) and had three children Samuel Bocock (1746-1783), Elijah Bocock (1750-1823), Jason Bocock (1750-1816) and then he married (third wife) Agness Johnson b.abt 1731 in 1757.
Salem & Susannah's only child appears to be John Bocock b.abt 1739 ?Virgina and d.abt1753 Buckingham, Appomattox, Virginia, United states.
This John Bocock is said to have been born in about 1739 and died in 1853 but I think its unlikely that he lived to be 114 years old, so I think the dates in many trees online are incorrect. Additionally I cannot find a birth certificate to connect him by birth to Salem & Susanna.The records on line show that a John Bocock married Judith Thomas (b.abt 1742) in the year 1772 she died 1 February 1806. Expect that there is another generation in here some place.
There was John Thomas Bocock b.1773 d.1845.