Thompson was born in 1872 in
New York City, the daughter of William Dare Morgan and Angelica Livingston Hoyt and the sister of
suffragists and social reformers
Ruth Morgan and
Margaret Lewis Morgan Norrie, the latter of whom was the eldest of the Morgan sisters and
eponym of the
Margaret Lewis Norrie State Park in
Dutchess County, New York. Their younger brother, journalist Gerald Morgan Sr. (1879-1948), reported on the
Nazi invasion of Belgium for the
New York Tribune during
World War II. In 1896, Geraldine Morgan married Lewis Steenrod Thompson, heir to a fortune amassed by his father, William Payne Thompson, a founder of the
National Lead Company and later a treasurer of
Standard Oil. Devoted to fishing, hunting, and horse racing, Lewis Thompson lived for much of each year at Sunny Hill, a plantation he owned in southern
Georgia, while Geraldine Thompson generally remained with the children at Brookdale Farm. The couple had four children of their own, and the Brookdale household included five orphaned relatives and many servants. Lewis Thompson died in 1936. ==Activism==