from The Geer Genealogy: A Historical Record of George and Thomas Geer and Their Descendants in the United States from 1623 to 1923, by Walter Geer (Norwood, MA: The Plimpton Press, 1923), pp. 57 & 116 [ID# 391].
Their parents are listed as Luther Geer (1793-1872)& Esther Whipple (1795-1847)
Luther's parents are Solomon Geer (1760-1809) & Anna Pierce (1773-1814)
Solomon's parents are Jacob Geer (1732-1814) & Ann Patten (1730-1804)
Jacob's parents are Isaac Geer (1681-1746) & Martha Lee (@1685-?)
Isaac's parents are George Geer (1621-1726) & Sarah Allyn (bef. 5/22/1642 - aft. 1723). George is the Immigrant Ancestor.