Before Napoleon's reign, the northwestern part of the Dutch province of Noord-Brabant used to be part of Holland. In that area the Dutch Reformed faith was predominant, while the remainder of the province had remained catholic. Since people used to marry people of the same faith, some inbreeding occurred within Dutch Reformed families in that area.
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| Registration of the baptism of Hendrik Mouthaan in 1774 in 's-Gravenmoer |
Nicolaas Mouthaan was born on the 6th and baptised on December 8, 1799, in 's-Gravenmoer. His parents are Hendrik Mouthaan (1774-1808) and Willemijna Mouthaan (1777-1821). Her parent's are Nicolaas Mouthaan (1727-1814) and his second wife Maria Mouthaan (1737-1807). Nicolaas is a descendant of Jan Willemss Mouthaen (†1631) through 3 lines of ancestors.
Additionally, Aelbert Jansz Mouthaan (1633-1677) had a daughter Maaiken Mouthaan (1657-1735) who married Staven Heijblom (†1745). Their daughter Maria Heijblom (1697-1757) married her first cousin Hendrik Mouthaan (1704-1788) and is the mother of Anthonie Mouthaan (1731-1784).
