Petrus Franciscus Coert “Piet” was born 19th May 1880 in Leiden (The Netherlands) and died Leiden 28th February 1956. He was a Plummer and married 23rd May 1906 in Leiden Clasina “Sien” Smit (born Leiden 23rd November 1882; died 25th September 1968). They had 8 children. Petrus Franciscus (Piet), Clasina (Ina) born on the 27th of February 1909, Jannetje (Jo), Johanna (Annie), Willem Frederik (Wim), Cornelia Gijsberta (Corrie), Jacobus (Ko) en Antonius Mathieu (Mat). Piet has two sons, Ru and Rob (born in 1933), both not married. Clasina (Ina) has three daughters, Elly, Ina and Marianne. Jannetje has two sons. Johanna has no children. Willem Frederik has two daughters. Cornelia Gijsberta has two daughters and two sons.