My copy of the Seaver Genealogy has the following reference:
"619 Name unknown lived in Brookline. NAME LATER FOUND TO BE JOSEPH
i William: 1/7/1805, Brookline; Aug.,1893. Watertown, N.Y.; Ch: Richard F. (1832 Watertown), William (1840 Watertown), Charles H. (1843 Watertown; now living 127 N. Pleasant Ave., Ridgewood N.J. ch: Roscoe Allen, 1870 adams N.Y.), alonson S. (1845, Watertown)
ii Joseph
iii Nathaniel"
This is rather cryptic however I have quoted as written in 1924.
Hope this is of some assistance.
Regards
Spencer Seaver