Kia ora Jeff, I think you will find that there are many Doig descendants out there, including many who have corresponded with those who run 'The Doig Family Society' website to add and correct information, such as myself. Much of the information on Geni is from the website, substantiated with research from other official sources. If you look in the 'Overview' tab you will see the references used directly reference back to 'The Doig Family Society' website. You will find that 'John Doig' is listed as No. 20 on another page of the same website at this link: https://www.doig.net/DOIGF.html. Both pages have circa for his birth date - this means approximately, and the date that best fits has been used on Geni. There are, however, some inconsistencies that have occurred due to merges with profiles added by others who may not have seen the website we are working from. These need to be corrected, but it is a big job and takes time. However this is the only way we can have the most correct Doig tree, as unmerging will only see them remerged by someone else at some stage in the future resulting in the same problems. Working collaboratively on those profiles, both honours our ancestors and is in the spirit of Geni's goal to build the one World Family Tree.