I found a paper I have on the Dohners. It's not much, but is as far back as I've gotten.

Michael Dohner, born roughly 1700 in Switz., immigrated in 1715. Died in 1762. I have that he died in E. Lampeter Twp., Lancaster Co., which is where I am. The Lancaster Mennonite HS is actually on land where he lived and built a cabin. He was married to a Magdalena. I guess he could have eventually moved to Lebanon or John & Anna (Landis) Dohner did. Children of Michael are: John, Maria, Veronica, & Abraham.

John Dohner, 1726-1803
Married Anna Landis
Children - Henry, Joseph, John, Barbara, Maria, Jacob, Anna, Abraham, Catharine, & Christian.

That's all I have, plus my line after Joseph, which you probably wouldn't be interested in. I'm sure you or we could find more info on Michael somewhere online, but that's as far back as I have. Again, Happy Holidays.