A native of Ireland, Croghan emigrated to Virginia, where he married Lucy Clark, sister of Jonathan, George Rogers, and William Clark. After the Revolution, Croghan moved to Kentucky near Louisville, where his estate “Locust Grove” later became the home of his brother-in-law George Rogers Clark. Family manuscripts in this series also pertain to Croghan's sons, John and George (1791-1849), the latter a soldier who served with distinction under William Henry Harrison in the War of 1812, and to their relative, an elder George Croghan (d. 1782), who in 1741 had come from Ireland to Pennsylvania, where he was a noted Indian trader and land speculator.
