Peter married Phronick Wolhamer.
Phrony Volkammer, Wolhamer, or Holhammer. There were Coldhammer families in Brunswick.
Peter and Phrony were witnesses at the 1813 baptism for their nephew Isaack, son of Isaak Davis and Betsey Thomson; also at the 1830 baptism for their neice Lena, daughter of Peter Young & Maria Thomson.
Wolkammer is found as a surname in Gronigen, Netherlands
This could be the 1850 census record for Phrony:
1850 Federal Census. Brunswick, Rensselaer County, New York
Roll 585, page 82B
Fanny Thompson, 66, $3000 real estate
Stephen Thompson, 35, laborer
Mary Castle, 20
All were born in New York.