Book excerpt: This is an update of The Trimble Families of America published by John Farley Trimble in 1975. The number of families is more than double and there is over four times as many individuals. When I started I only knew of Trimbles that migrated from Ireland. During the research I found Trimbles in Native Americans in South Dakota and Blacks in South Carolina whose ancestor was born free in Georgia in 1829. Trimbles have been Governors, US Senators, Supreme Court Justices, State Representatives, Lawyers, Doctors, Generals during the Civil War, Admirals during World War II, and leader of industry. There was an island of the Washington coast that was named Trimble Island. Two sisters in Pennsylvania married Bringham Young as his eighteenth and nineteenth wives.