I wish I did know more. Here is what I know:
Robert Walpole (b 10 Aug 1832 England - d. 15 Nov 1920, Scotch Plains, NJ) He came to US in 1840, enlisted 10 May 1861 Company I 3rd NJ Volunteers. He was a blacksmith and later a sheriff in Scotch Plains. He had a younger brother Samuel; I don't have any dates for him other than that he enlisted 1862 F Company 11th Infantry Regiment, NJ.
I don't know if he had sisters; I don't know where in England he was born, I don't know who his parents were. He married Sarah Fatoot (possibly Faitout) and had Mary Ellen "Ella" (1865-1943), Lynus, Almira (1867-1931), Sarah, Robert, Harriet, Lydia & Susan. Later in life he married a widow with the last name "Dobbins". As you can see, I have a lot of work to do on this line