My ancestor James Porter, born in 1777 in Donegal Co Ireland, immigrated to USA in 1817. He came with his wife Eleanor (Ellen) Scott Porter. They settled in Washington County PA. Then moved to Brooks County PA, then Harrison County, OH where James died in 1845. Eleanor moved to IA in 1863 with her married children one of which was my great great grandfather, John Cassiday Porter.
Eleanor Scott Porter's parents were James and Susie Scott. Her brothers were Frank, John, and James Scott. I am replying because my ancestor shows four connections to your information:
...Name (James Porter)
...Place (Washington County PA)
...Association (Scott surname)
My info source is family. It may not all be accurate.