I am looking into this couple as well. I believe Peter's father was John Suydam born 1780. According to "Hunterdon and Somerset Counties, New Jersey" by Snell page 806 the early Suydam family in Somerset county is described. It describes Ryke and Rachel Merrill and children Peter, Phebe, John who married Anetie (Agnes) Williamson, William, Ryke, Sarah, and Cornelia. The children of John and Anetie are described as; William (died young), Ryke, Peter, Lawrence, Abram, Lowe, Jane, and Sarah. Peter is mentioned as married to Sarah French, but I believe he was married to Lydia Ann Davis first.