(1) He is married to Maria Vergouwen.
Permission for the marriage has been obtained in Hontenisse on September 6, 1664.Source 1
datum: 6 sep 1664; naam bruidegom: Petrus Schaap; naam bruid: Maria Vergouwen; scan: 48; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-L9QG-2VR3?i=47&cc=2036997
(2) He is married to Marijntie Neeringhs.
Permission for the marriage has been obtained in Hontenisse on February 6, 1666.Source 1
datum: 6 feb 1666; naam bruidegom: Pieter Schaap; weduwnaar van: Maeijken Vergouw; naam bruid: Marijntie Neeringhs; scan: 51; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-L9QG-2V1N?i=50&cc=2036997
(3) He is married to Tanneken de Haan.
Permission for the marriage has been obtained in Hontenisse on January 1, 1667.Source 1
datum: 1 jan 1667; naam bruidegom: Pieter Schaap; weduwnaar van: Maartijntie Neerinxhs; naam bruid: Tanneken de Haan; scan: 53; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QSQ-G9QG-2VK1?i=52&cc=2036997