Adam Alexander (1758-1812), a Scottish physician, emigrated to Liberty County, Ga., in 1776, where he acquired land and married Louisa Frederika Schmidt(1777-1846).The Alexanders' son, Adam Leopold (1803-1882), graduated from Yale and became a successful planter in Washington, Wilkes County, Ga.
David Hillhouse (1756-1804) of Connecticut married Sarah Porter of Massachusetts and settled in Georgia in 1787.His son, David P. Hillhouse (1790-1851), had property and business interests in New England, South Carolina, and Georgia.His daughter, Sarah Hillhouse (1782-1808) married Felix H. Gilbert in 1804. Gilbert was a member of the Georgia legislature, 1807-1808.
In 1823 Adam Leopold Alexander married Felix H. Gilbert's daughter, Sarah Hillhouse Gilbert (1805-1855). They had 10 children.