Thank you for giving your consideration to my query.

According to the book The Northrup-Northrop genealogy: record of the known descendants of Joseph Northrup…by A. Judd Northrup, New York: Grafton Press, 1908, the father Enos “lived in Dutchess Co., N. Y. ; m [spouse not identified], in Mohawk Valley, N. Y.”, and the brothers Enos, Cornelius and Thomas were among the seven, or perhaps more, children of Enos Northrup, who was born (date not known) and died 1812. See page 385, “Unconnected Families.”
According to the History of Ingham and Eaton Coutnies, Michigan by Samuel W. Durant. published 1880 by D. W. Ensign & Co., Philadelphia, “Enos was the youngest in the family of Enos and Elizabeth (Griffin) Northrup which consisted of ten persons.” Seepage 312;

The A Judd Northrup reference does not show that the son Enos had a sister Ruth. The siblings specifically mentioned in this reference were Mary, Cornelius, Richard, Finetta, Sarah, Thomas and Enos.

Ten Ruth Northrups are indexed in the A Judd Northrup reference, but none is the Ruth Northrup I am searching for.

You state, "also i know that enos mother and father died when he was around 17." The son Enos was born Jan 13, 1813, so his father would have died around 1830; but the A Judd Northrop reference indicates the father Enos died in 1812.

In any case, the Ruth I am searching for was born about 1766-1767, about 28 years earlier than Mary, the first child referenced in the A Judd Northrup book.

I'm still searching for parents of Ruth Northrup who married John Jersey/Garsey.