Peter Williamson

Bef 1704 -

• Name	Peter Williamson
  Birth	Bef 1704	of Raritan, Somerset, New Jersey, United States
  Gender	Male
  Person ID	I5879	Petersen-de Lanskoy
  Last Modified	21 Jun 2026

  
  

  Family	Maria Cossart,   c. 2 Jul 1706, Reformed Dutch Church, New York City, New York, New York, United States
  Marriage	of Raritan, Somerset, New Jersey, United States
  Family ID	F2546	Group Sheet  |  Family Chart
  Last Modified	30 Jun 2026

  
  

• Notes

  RESEARCH_NOTES: 1. FHL book "The Cossart Family," by Joseph A. Cossairt, 1936, p. 52: "COSSART, COSART, COSSAIRT, CASSAIRT, COSSAART, COESART, COSAT, COSSATT, KOSSART, COZAT, COZATT, CASSAT, CASSATT, COZART, ETC. 153. Maria or Mary Cossart, daughter of David Cossart (9), baptised at New York City July 3, 1706. She was baptised in the Dutch church as Maria but in her father's will she is called Mary Williamson. The fact that her father names Peter Williamson as one of the executors of his will indicates that was the Christian name of his son-in-law. This family which later became very numerous in Somerset County, N.J. seems to have first settled about Bound Brook and Raritan. The first mention I find of the name is in 1706 when a David Williamson and wife appear as witnesses to a baptism at Raritan on February 24, 1739 a Peter Williamson and wife Mary appear at this chruch to have a son Jacob baptised and again on January 25, 1745; they have a son Theodore baptised, but whether the mother was Mary Cossart or not we do not know. But very few of the name appear on the early Raritan records. I judge that most of the family belonged to Bound Brook Presbyterian church whose records cannot be found, it being the custom of the Presbyterian pastors of this period to take the records with them when they changed pastorates. The records of the early Bound Brook church were they now available, would doubtless throw much light on many of these early Bound Brook families. The name Peter Williamson appears on many public documents now recorded in the Secretary of State's office at Trenton, New Jersey. His services seem to have been much in demand in the settlement of estates, transfers of land and etc., by men of this locality, but whether he was the same Peter who seems to have married Mary Cossart or a later Peter, that we do not know. The name of the common ancestor of this family or from whence they came, we have not yet been able to learn. Peter Williamson was one of the executors of David and Johannes Cossarts wills. The children of Williamson were supposed to have used the surname of Williams and several of them were members of the Dutch Colony in York County, Pennsylvania, and some of them went to Kentucky with the pioneer, Peter Cossart, son of Francis Cossart (157)."