I believe I have the brothers & sisters of Henry Green you're looking for, which I found just yesterday on the LDS FamilySearch site. One of Henry's brothers was my great-great-grandfather Erastus Green, who was apparently the oldest of the Green children; he married Jane Scott. Their parents' names were Henry Green (1789-1870) and Mary Ann Silver (1816-1910), and they had a total of 13 children, some of whom appear to have died in infancy (or at least my source has no information on them past their births).

Based on the info I found at LDS, there were several marriages between Greens and Vankoughnets. I'd love to share info with you -- if you are a descendant of any of these Greens, you & I are distant cousins.

-- Mel