Hello Donna - I am certain of my data from John Robar and Martha Banks to the present - we have an abundance of data for support. For James (also called Jacob) being the father of John we have family tradition - it is based on information from Lottie Porter, daughter of Addie Robar, supported by Eva Robar and Lottie Robar - I knew all of these people and believe they knew what they were talking about when it came to the family origins. The historical background is covered by Wynthrop Bell in his book, "The Foreign Protestants of Lunenburg County." It is a scholarly book that I found fascinating. The connection between Abraham and James needs verification. From marriage lists and other sources I have the following: (1) Abraham Robar m. Elizabeth Catherine -- They had one daughter when they came to NS in 1852.Other children: George Andreas (often corrupted to Andrew, born 1756; Andrew born 1758; Catherine b.1761; incomplete list. (2) Andrew Robar (son of Abraham) married Barbara Motz, April 21, 1778. Ch: Mary (1783) Catherine (1785) George (1788) James (1794) and possibly others. (3) James (son of Andrew) m. Susanna Clattenburg in 1818. They had an infant son die that year, and James is called a farmer living at NW Range. Mary (b.1819), John and possibly other children. (4) John, son of James and Susanna (M.) Martha Banks at Digby and they are the ancestors of many of the Annapolis County Robars.
One problem is that there are so many men named John, James, Andrew and George Robar. I think often we have to go by who they married, and I am confident that the record of marriages noted above is correct. But apart from that we do lack complete documentation for the above list.