Letitia Buckman/John Briggs Bucks Cty

Searching for information on John Briggs and Letitia Buckman and their children/spouses.John and Letitia married March 22, 1769 in Wrightstown, Bucks County per Quaker doctrine.John died Bucks County in 1828 and Letitia on October 7, 1833.Children include:

Asenath Briggs born unknown and died March 24, 1848 Bucks Cty
Letitia Briggsborn unknown and died 1843 Bucks Cty
Joseph Briggs born March 6, 1770, married Martha Dawes October 2, 1800 and died August 24, 1864.
John Briggs born Bucks County and married Mary Vandegrift.
Mary Briggs born 1772, married John Linton on May 17, 1792,
Frances Briggs born October 19, 1773, married Jacob Janney on November 16, 1792, died on August 21, 1851
Martha Briggs born June 25, 1780, married Samuel Swain on January 14, 1810
Mahlon Briggs born April 1789, married Amy Dawes on September 21, 1821
Elizabeth Briggs born 1793 and married John Carver
Hesther Briggs born 1793 and died October 7, 1833.