Thomas Hyer was born at Possibly, Appoquinimink Hundred, New Castle County, Delaware. Thomas Hyer was born at Of, Apoughquiminy, Chester County, Pennsylvania. He married
Elizabeth Ryke. Thomas Hyer and
Rachel Demarest resided at at Tarrytown, Westchester County, New York, between 1702 and 1708. Thomas Hyer married
Rachel Demarest, daughter of
Jean Demarest and
Jacomina De Ruine, on 9 May 1702 at Dutch Reformed Church, Hackensack, Bergen County, New Jersey. Thomas Hyer resided at at Appoquinimink Hundred, New Castle County, Delaware, in 1709. He an Elder in Drawyers Presbyterian Church, Appoquinimink Hundred, New Castle County, PA now DE at Drawyer's Presbyterian Church, Appoquinimink Hundred, New Castle County, Delaware, 1727. He the treasurer of Drawyers Presbyterian Church, Appoquinimink Hundred, New Castle County, PA now DE at Drawyer's Presbyterian Church, Appoquinimink Hundred, New Castle County, Delaware, 1739.