Since Susanna (Estey) Wright may well be Susannah Estey b. 2UAG1769 (possibly in Rowley, Essex Co., Massachusetts; possibly in Maugerville, now in Sunbury Co., New Brunswick), d/o Zebulon and Mary (Molly) (Brown) Estey; I would think the chances that Zebulon Wright was her son is quite high. (Zebulon came to NB on Capt. Francis Peabody's schooner, 15JAN1765; which is why I suspect Susannah was b. Maugerville, not Rowley.)
One web site on the Estey family does suggest that Nathaniel Wright's wife was this daughter, Susannah, at:http://www.myfamilyhistory.com/Towne/pafg14.htm#124
It does not, however, list their children. Another, now defunct, site states that Susannah m. 1st Isaac Chase, 2nd Justin Wright.
Nathaniel Wright petitioned for land in Sunbury Co (1785 twice) and in Queens Co. (1791, 1793, 1802.) In 1791, he petitioned with Nehemiah 'Easty', whom, I believe, was a s/o Zebulon Esty; therefore probably Susannah's brother. If Nehemiah was he b. ca. 1794, d. 30JUL1877, he ended up in Carleton Co., but I gather that was a son.
It would seem that Nathaniel Wright at least knew the family of Zebulon Estey; and there is some opinion that he married Zebulon's daughter; so it seems reasonable to suspect; if location and timing seem right, that Zebulon may have been named after his maternal grandfather.
A web site at:http://www.jenngen.com/ne/fam00243.htm
states as much, and lists amongst Zebulon Wright's children, Zebedee Wright, who was in Carleton Co. in 1871. Another son, Thomas Wright presumably is he who ended up in Arthurette, Victoria Co. I suspect I have met some descendants in Plaster Rock, years ago.
Since Nathaniel Wright came in 1783 as a single man on the "Two Sisters", with Uriah Wright (with a wife and 7 children) I would suspect he was Uriah's son. Since they were from New York; I would suspect they were connected with the Westchester Co. Wright's; especially around North Castle. Uriah, however, seems to have come from South East or Frederick Precincts, Fishkill, Dutchess Co., NY. However, in an indictment against him and others (20OCT1776), the others include names: Brundage, Merritt, Fowler, Theal and 'Dickeson', which I would associate with Westchester Co.