He is married to Maria Joanna Dewachter.
They got married on July 25, 1747 at Langemark, West Flanders, Belgium.Source 1
Child(ren):
gonl: GenealogieOnline
Petrus DEVELTER
Children Maria Theresia DEVELTER
https://www.genealogieonline.nl/en/stamboom-hickendorf/I28743.php
FamilySearch: Family Tree
Petrus Franciscus Develter
Birth 14 February 1784 • Langemark, West Flanders, Belgium
Parents Genoveva Constantia Decaesstecker • Pieter Joannes Jacobus Develter
Lead confidence: 3
https://www.familysearch.org/tree/person/G7NH-2RV
gonl: GenealogieOnline
Petrus Joannes Jacobus Develter
Children Carolus Ignatius Develter
https://www.genealogieonline.nl/en/stamboom-vanduynslager/I14168.php
FamilySearch: Family Tree
Petrus Develter
Birth Langemark, West Flanders, Belgium
Spouse Maria Joanna Dewachter
Children Joanna Genoveva Theresia Develter
Lead confidence: 5
https://www.familysearch.org/tree/person/G796-8GL