From SNP testing at 23andme, I have found that Boag and Boggs belong to the same haplogroup, R1b1a1a1a1a1a or R-DF21. This holds out the possibility that Boggs and Boag have a common ancestor. To test this possibility, some male Boag's are needed for Y-DNA testing. The Y-DNA37 test is $139.
Here is the link to join the project.
http://www.familytreedna.com/group-join.aspx?Group=BoggsIn case, you have not visited the Boggs Surname Project recently, here is a link.
http://www.familytreedna.com/public/Boggs/default.aspx?secti...
Please consider this project, as we try to unlock our genealogical origins. If you have questions or have an interest, please let me know.
Frank Boggs
Boggs/Bogue/Boag Surname Project Manager