Son, Ralph was born 1921 in PA, although parents listed as Rodd McMaster, b. 1883, and Nancy McMaster, b. 1893. Children were May, Elinore, Mable, Jean, Roberta. Residence in 1940 was Moon Township, Allegheny, Pennsylvania. Variance in dates, but too many matches for coincidence. Maybe Robert B. was father of Rodd.