Parents: William Gregg and Ann Wilkinson
Spouse: Elizabeth Cooke

"A Short History of John Henry Gregg's Family: John GREGG (1668-1738)
"John Gregg was 14 years old when he left Ireland and settled in Delaware. He was married at Concord Friends Meeting (Delaware Quakers). John was only 19 years old when his father died. His family continued to live in the family home and keep possession of their land.
"John was a serious, proud and capable youth. He was always a faithful [Quaker] Friend and a busy person. In the summer of 1694, when 26 years old, he built a two-story stone house and married Elizabeth Cooke at Concord Friends Meeting, November 11, 1694.
"On 17 Aug 1702, John and Elizabeth bought more land and erected a Grist Mill. At one time, John owned 5,700 acres of fine land along the Brandywine River. John Gregg had seven children (3 girls and 4 boys)."
Source: "A Short History of John Henry Gregg's Family and their Ancestors", by Elma Gregg Marshall; http://www.geocities.com/heartland/ridge/5850/pages.html"
***
"Information Per Family Sources and One World Tree
John Gregg, of Christiana Hundred, New Castle County, yeoman, aged about 67 years, made a deposition about 1735, "that he has dwelt in the sd County about" 51 years (No. 175, Miscellaneous Papers, 1655-1805, Three Lower Counties, Hist. Soc. of Penna.)
He was one of the advisors and guardians of his only sister's husband (first) William Dickerson a weaver whose will was probated September 20, 1708. He was co-executor with his only sister Anne of her second husband John Houghton's will, probated on May 27, 1720. Through such items we gain some side-lights and knowledge of his life. Evidently he was in poor health; his will was made as a yoeman of the Christiana Hundred, Delaware on March 6, 1738 and probated at Wilmington on April 27, 1738. Burial must have been at the Friends Burying Grounds in Center, Delaware. He was always referred to as "John Gregg of Brandywine".
John Gregg. Yeoman. Chris. Hd. Apr. 27, 1738. March 6, 1738. Misc I.99. Wife, Elizabeth. "Wm., my eldest son"; son, Thomas; son, Joseph; son, Samuel; dau., Hannah; dau., Rebecca; dau., Emey. Exc. son, William; son, Samuel.
1694 1st day 10 mo. The Mo Meetng held at Thomas Hollingsworths, John Gregg having laid his intenetions of marriage (with Eliza Cooke) before this meeting. The meeting appoints George Harlan and Geo Robinson to make enquiry Concerning his clearness and to make their return to the next monthly meeting.
1694 5th day 11 mo. The Mo Meeting held at Thomas Hollingsworths, John Gregg haveing laid his inteneitons of marriage before this meeing (this being ye sencond time) Geo Harlan & Geo. Robinson being appointed ye last meeing to enquire concerning his clearness, and they now report yt all is clear as for as they can find, the meeting therefore orders him a certificate. Text: p. 23 Text: p. 32Change Date: 1 MAY 2001"
Info from LaDon

Marriage 1 Elizabeth Cooke b: ABT 1670 in Darby, Concord, Delaware
Married: 11 NOV 1694 in Concord MM, Chester, Pennsylvania
Children
William Gregg b: 1695 in Christiana Hundred, New Castle Co., Delaware
Amy Gregg b: ABT 1698 in New Castle, Delaware
Thomas Gregg b: 1701 in New Castle Co., Delaware
Samuel Gregg b: 5 AUG 1710 in New Castle Co., Delaware
Joseph Gregg b: 5 AUG 1710 in New Castle County, Delaware
Hannah Gregg b: 1713
Richard Gregg b: 1715 in New Castle Co., Delaware
Rebecca Gregg b: ABT 1716 in New Castle Co, Delaware
John Gregg b: 1716
George Gregg b: 1720

Sources:
Title: World Family Tree Vol. 49, Ed. 1
Author: Genealogy.com, LLC
Publication: Release date: December 1999
Note: Customer pedigree.
Repository:
Nancy Davis