I just came across your note from 2005.
Robert McKnight was married. His wife, Joan, already had children from a previous marriage. Robert McKnight didn't want to include the children in the marriage, so they were sent away:
Joan's children:
Ellis Brown mostly to boarding school. Ellis became a chemist, who developed the ability to grow penicillin in large quantities for commercial sale, and also warned against some food dyes for margerine that could cause cancer. Ellis had children, and was married and divorced a few times.
Boyd Brown who died in childhood from complications caused by an ear infection.
Betty Brown (Annas) who was a school teacher, studying new techniques of teaching reading, and who lived in Japan for a year before WWII. Betty Brown lived in my mother (Ann L. Bick)'s family as a semi-adopted sister. Betty married Nate Annas, and had a son Boyd, who developed deafness.
Ann Bick is the daughter of Martha Linn, who was the sister of Joan McKnight.
Ann Bick was born in 1915, married John Bick. Ann Bick died in 2011.
Ann Bick lived at 245 Linden St. (not 247), Moorestown NJ from 1955 to 2005, and moved to Cincinnati to live near my sister, Nancy Clark.
In her old age, Joan McKnight was cared for by her daughter Betty, in Claremont, CA, but we had never heard of anybody else before related to the McKnight family. We only knew that Bob McKnight was an executive at General Motors.