Maud Percival is my great grandma and I inherited some geneology info from her daughter, Margaret Koppenhaver. My info agrees with CeCe's. Here is what I have:James and Abigail Robinson Percival had Ebenezer, Mary,James, John and Timothy.
James (b1704) and Elizabeth Bacon Percival had Ebenezer,Mary, Abigail, Anna.
Ebenezer and Lucy Knowlton Percival had James, Stephen,Elizabeth,Jeremiah,Lucy,Mary, Asahel, Asa and Ebenezer.
James and Molly Percival had James Jr, Stephen Chapman (my relation) and a daughter.
Your James Jr married Eunice Curtis and had Moses, Darwin, Cotton, Ransford and Vesta. You can find them on the 1820 cansus living next to brother Stephen and wife Nabby. My source notes that James Sr is in the DAR records as married to James Jr wife Eunice--so that might be confusing. Molly's name is misspelled "Parseval" in some church records.
My Stephen was a medical dr , married Nabby Nash and had Franklin, Cullen (my ancestor), Denman and Mary. They loved in Plainfield til after 1804 when they moved to Madison Co NY where Nabbys parents had moved to...later moving to Oswego Co.
Cullen m. Rachel Quigleyand had 9 children including Stephen V. Percival (my relative),
Stephen V. m Mary Jane Comstock and they had 11 children but only 4 girls had children so their "percival" line ends there. My great grandma was their eldest girl, Maud.
I have birthdates, deaths, war service, etc on all the names listed above including info on people not in my direct line. Would be happy to share. It is from research done by Lorraine Martin (daughter in law of Florence Percival--Maud's sister).
She also has info going back a bit farther than where I started but I knew this was going to be a long email and didnt want to bore you!!Mary Jo