Hello Jackie, My name is Steve Barnhart and my grandmother is Marjorie Emily (Black) Abbott, she is the older sister of Dorothy (Black)Bunker. Their mother's name is Mable Rudler, who married David Wallace Black in 1902, in Isabella Co., Lincoln Twp. Mich.David and Mable were both born in Isabella, he, in 1878 and she in 1888. Davids father is David W. Black b. 1838 Scotland and mother Agnes Pasella m.n.u.? b. 1852 Ontario, they were married in New York State 1866. David Jr. married Mary Charlotte Dangler in 1921, the year after Mable B. Rudler died, they had several children Wallace, Carrie, Ernest, Olan, Nathan, and Mary Jean.As to Bill and Dorothy Bunker, they had four kids, Bill Jr., Richard, and twins Janice & Janet, please, say from Steve when you see them next, thanks. Write me if I can help with other info!