Betsy Oliphant, born 1764, was the daughter of James Oliphant and Jannetje Woertman. Her known siblings were Duncan, born 1748, Jane, born 1750, Andrew, born 1752, James, birth date not proven, Peter, born 1762. There likely several others who either died or not yet found. James Oliphant was born 1724 to Duncan and Mary Oliphant in Hunterdon, New Jersey.
Jannetje Woertman was born to Andries Woertman and Jannetje Post probably in Somerset County, New Jersey where they were living at the time. You may e-mail me for more information.
I would like to have your line of descent for the planned Oliphant book.