Have you found the information you were looking for on John Porterfield? You can find it in the Frank Burke Porterfield book, "The Porterfields" published in 1948.
The following is information I have on John "The Immigrant" Porterfield. A word of warning. There was a John Porterfield in Trenton, New Jersey that I call "The Merchant" who was a second cousin of "The Immigrant". Too many researchers have them mixed up, or actually believe they are the same person. The big reason for this mixup is because their birth year was the same and only one year separated their deaths. To top that off, their fathers were both named William (these two Williams were cousins). "The Merchant" was single, his will can be found on this web site.
John "The Immigrant" Porterfield was born 1675 Ballylennon, Donegal County, Ireland. He died 1739 Lancaster County (later Cumberland County), Pennsylvania. His wife's name is unknown.
John, his wife, and all children were born in Ballylennon, Donegal County, Ireland.
William 1712-1789 died in Berkeley County, Virginia (Now West Virginia). He married Martha Alexander 1720-1789. Had at least 8 sons and 2 daughters.
Charles Sr. 1714-1778 died in Frederick County, Virginia. Wife unknown, had 2 sons, 2 daughters. (son Charles Jr. was a Lt. Col. in the Rev War and was quite the hero. Can read about him in a book "An Officer Of Very Extraordinary Merit" by Michael Cecere. Son Robert was also in the Rev. War and became a General in the Spanish American War)
Robert Sr. 1716-1785 died Hanover Township, Lancaster (Dauphin) County, Pennsylvania. Wife Ann, maiden name unknown. Had at least 3 sons and 1 daughter.
James Sr. 1718-1777 died Deep River Plantation, Cambelton, (now Fayetteville), Cumberland County, North Carolina. Wife Malinda, maiden name unknown. Had at least 3 sons, 1 daughter.
Patrick 1720-1789 died Augusta County, Virginia. Wife unknown, had at least 1 son.
Eleanor 1722-1782 died Augusta County, Virginia. Married Robert Boyd Sr. 1818-1852. Had at least 2 sons and 1 daughter.
John 1724-1786 (my ancestor) died Newton Township, Shippensburgh P.O., Cumberland County (previously Lancaster County), Pennsylvania. First wife, and mother of his children, name unknown. His second wife was Sarah Cunningham. He had at least 4 sons and 1 daughter.
Samuel Sr. 1726-1789 died Newton Township, Cumberland County (previously Lancaster County), Pennsyvania. His wife's name is not known. Had at least 5 sons and 3 daughters.