He is married to Benedicta van den Avijle.
Permission for the marriage has been obtained in Axel on January 23, 1790.Source 1
They got married on February 7, 1790 at Axel.Source 11790-01-23 (hier getrouwd 7 februari), Gulielmus Moerman fil. Joannis j.m. van en won. te Moerbeke met, Benedicta van den Avijle j.d. geb. van en won. op den Overslag Axelambacht
Axel, transcriptie ref. trouwboek 1604-1648, 1653-1691, 1691-1729, 1729-1749, 1750-1791 en 1791-1796 http://www.geneaknowhow.net/script/zeeland.html