ID: Duncan brothers (Gen. 10: John-Walter-William-Skipper-William-David-Jason-David-Mary-10 kids)
Source: Some Pictures of the Family Duncan. Used with permission.
Notes: (left to right) Edgar, Charlie, Frank, Walter, and [inset] William Duncan were sons of Mary (Fairfield) and Gilmore Timothy Duncan. Birth order is William, Edgar, Walter, Charlie, Frank. They had five sisters.