Hi, I have no idea about your line at this time. If you can go back any number of generations with each being found in the birth, marriage, work records, church records, land ownership, tax records, census records, military records, death records, burial/tombstone locations etc. then that person must be real. If you hit a stone wall of nothing unless it came from Anjou, then that person is unreal!
I am compiling data on all known Duncan family members found in the Duncan Surname Association files into genealogy pedigrees with sources for everything that I can find. They have all Duncan records found in every state from 1850-? but no one had put this stuff together in family units. At present I have over 158,000 people in the file. If you can send me your pedigeee I will be happy to check it with what I have recorded. You may be lucky and will not have very many errors to remove, if any. Could be that you did not get messed up with the Anjou junk. Mar Ann (Duncan) Dobson had worked over 50 years on her line, claimed Marshall Duncan as her ancestor and also William Duncan, the elder as the oldest in her line. She had 4 other people that claimed the same lineage. When I contacted her about Anjou and explained that they needed to use DNA to prove the genealogy they wanted to report to the world. When the DNA results came back, none were related to the others. They all were from 5 different Duncan lines! She was able to identidy the bad individuals in her records and start to identify the real ancestors. It was a lot of work but proved well worth the effort. She now has a better family tree with all members proveable! If you have others that claim the same lines as you then DNA testing of the male members will prove/disprove the linkage! Y-DNA testing of the male members can be brothers, cousins, etc. that are known positive family members will provide the beginning of the proof for everything. If any mistakes are identified, then you will know that the false genealogy has been at work! The first and best DNA testing company is FamilytreeDNA.com located in Houston, TX. They are very accurate and are the standard for genealogy DNA testing. All others are cheap copycats after the money but their results have to be played with to get the actual accurate results reported. Sometimes the Y-DNA people are hard to locate for this testing but it is worth the effort to contact them and get the tests accomplished to prove the linkage between people that hopefully are related. If the Y-DNA report does not prove family connections then everyone knows they have been caught in the Anjou trap! I have been in that trap because my aunt started with the trash William Duncan the elder junk and gave me that story as our family origin! By the time I became aware of the false data It took me about 3 years to remove the people that Anjou generated! Lot of wasted time but it had to be done! If you would like me to review you family data just send me a file of what you have and I will let you know what I find. I use FTM version 16 (that is version 2006 with a patch.) But any file of your data will be useful.
Donald Duncan FamilyTreeDNA.com Kit 11804 Y-Search ID VE72J Haplogroup R1b1a2a1a1b3