https://discover.familytreedna.com/groups/cockerham/tree?subgroups=301430
Watch for updates from the lab link above.

Surnames under the common male ancestor R-BY136207
BigY Branches: (Cockerham, Cochran) (Whitlock, Massey) (Cochran, Cochran) (Carter, Carter) (Powell, Dawkins, Cochran) (Cochran)

Branch 1650 CE https://discover.familytreedna.com/y-dna/R-BY136207/story
(see BigY Reports in left column)
He is the ancestor of at least 5 descendant lineages known as R-FT134834, R-FTA51439, R-FT83803, R-FT20627 and 1 yet unnamed lineage.

R-M269>L23>L51>P310>L151>U106>Z2265>BY30097>FTT8>Z381>Z301>L48>Z9>Z30>Z27>Z345>Z2>FGC31495>S15510>Y7378>Y7404>FGC48614>S8958>FT60950>S20654>S25738>BY19494>BY50716>BY72309>BY113940>BY65234>BY136207
https://pbase.com/image/171085428