I have been involved for over 10 years with the HANKINS surname project on familytreedna.com. We have accomplished several things:
1) proven the large family tree of Thomas John Hankins, Jr.( using your name) born ca. 1702 New Jersey or New York, married Mary Clevenger 1728 in Burlington Monmouth N.J. migrated to Crooked Run, Frederick County, .Virginia in 1737/38, with closely associated surnames BRANSON, SHARP, BORDON, and died in 1748 at Crooked Run.
2) we have YDNA documented descendants from sons, Richard, John, William, and probably Joseph and David from our participants.
3) we have YDNA documented at least two unrelated HANKINS lines out of Virginia.
4) we have moderately good YDNA evidence of close relation of Richard Hankins and William Hankins both having wills published in 1748 in Middlesex County, N.J. as seen in HANKINS-HARRIS book by Sharon Harris of Delaware. It is surmised that these three men(Thomas John, Jr., William and Richard) are brothers or close cousins.
The HANKINS-HARRIS book was a very good source with high degree of aggrement with YDNA.
Jordan Henry Hankins, Omaha, Nebraska June, 2018