Hi David,
A gentleman named Otto Seabaugh has done a great deal of research on this family. I seems that Christopher Seabaugh arrived in PA some time before 1750 from Germany.
He has detailed information in a book "Seebach to Seabaugh". Seebach was apparently a German Spelling of Seabaugh.
Christopher's son Christian, after the Revolutionary war about 1783, left Pennsylvania and moved to North Carolina.
Around 1810 He and his family went west to the Upper Louisiana Territory settling in what is now Bollinger County MO. There are hundreds of Seabaughs still there Along with thousand of their blood relatives
If you will contact me at
Cliffs@ipa.netI will be glad to give you more information.
Cliff