Andrew Shaffer has to sons, Nicholas and Michael.
The "Genealogy of the Shaffer Family" shows Andrew Shaffer was born in Holland and lived in Elizabethville, Dauphin County,PA

Michael had three sons, Michael (2), Israel, and Benjamin. Israel is Captain Israel. Michael (2) married Margaret Hill. That is all that I know about Michael.

Nicholas had 4 sons, Andrew, George, John, and Michael and one daughter whose name is not known.

George Shaffer married Susanna Pifer in Manayunk, Philadelphia County, PA in 1784. George and Susanna has ten children.

George married Elizabeth Pittenger
John Cornelius married Abigail McCloe
Samuel married Elizabeth Eason
Jacob married Elizabeth VanFleet
Christian married Maria Beeber
Elizabeth married ?? Schock
Adam married Elizabeth Gortner
Martin married Mary Shreffler
Sarah married John Sheffer
Andrew married Elizabeth Irwin

The "Genealogy of the Shaffer Family" shows son of George and Susanna,Andrew, Martin and George moving West to Muncie Indiana that is in Delaware County.

Andrew may have been married to Mary Smith and then Sarah Roush.

I have the most information on the family that stayed in Lycoming County,PA.

I have a family tree on ancestry.com but you have to be either a subscriber or registered guest to see the family tree. A family tree can be posted to Rootsweb that all can see.

The name Shaffer is spelled Shafer, Shaver, and Schaeffer, so it is difficult tracing family.