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Mark
12-22-2015, 07:01 PM
I have my Big Y results showing DF21-S5488-Z16294-ZZ21
I have a Cornish surname that I can trace back to Columb Major around the 1400's

I am new to genetic genealogy but believe DF21 could have entered Cornwall from Brittany 3000 ybp, do my Big Y results verify this?

Mark

Dubhthach
12-22-2015, 08:04 PM
If you've done BigY I suggest submitting your data to Alex Williamson's ytree site:

Here is the DF21 tree on it:
http://ytree.net/DisplayTree.php?blockID=6

Instructions:
http://ytree.net/Instructions.html

As for 3,000 ybp without ancient DNA as a baseline I don't think we can guess when a haplogroup might have arrived in an area. What we do know is that DF21 was definetly present in Britain during the 1st century BC (one of 2 Hinxton remains was DF21+)

Over time no doubt as more ancient genomes are sequenced we might be able to make better guess on when a specific haplogroup was in an area, there's probably no reason to doubt that it was there during a good chunk of 1st millennium BC.

Mark
12-23-2015, 08:25 AM
Thanks for your reply
Alex has all my data and placed me as ZZ21


If you've done BigY I suggest submitting your data to Alex Williamson's ytree site:

Here is the DF21 tree on it:
http://ytree.net/DisplayTree.php?blockID=6

Instructions:
http://ytree.net/Instructions.html

As for 3,000 ybp without ancient DNA as a baseline I don't think we can guess when a haplogroup might have arrived in an area. What we do know is that DF21 was definetly present in Britain during the 1st century BC (one of 2 Hinxton remains was DF21+)

Over time no doubt as more ancient genomes are sequenced we might be able to make better guess on when a specific haplogroup was in an area, there's probably no reason to doubt that it was there during a good chunk of 1st millennium BC.

Rory Cain
01-25-2016, 03:34 AM
DF21 was in the Isles long before Hinxton4. We now have the ancient DNA confirming that. Rathlin1 was R-Z30233 which shows that this long ignored SNP is upstream from FGC 3903 rather than parallel to it. Rathlin2 has an ambiguous reading that could make him R-D5488, brother clade to Z30233, both being "sons" of DF21. If these two DF21+ men can make it to remote Rathlin and die there about 4,000 years ago then DF21 would appear equally capable of making it to less remote Devon-Cornwall.