Biography
Countess van Efferen. Daughter of Jan Willem (1692-1745), Count of Efferen, and Cornelia Evardina Jeanette van Weede. Married to Hendrik van Utenhove (1715-1767), Heer van Amelisweerd.1 Married (1771) to Maximilien Henri De Saint-Simon (1720-1799), Marquis of Sandricourt
Life with Boswell
Boswell met Madame Amelisweerd at the assemblies and other social events during his stay at Utrecht in 1763-64. On December 8, he wrote having being told by the Countess of Nassau Beverweerd that "[Madame Amelisweerd] was married at seventeen, when one does not know the consequences; said marriage was unequal" and that "Monsieur d'Amelisweerd [was] a rough squire, but jealous of his lady, a charming little woman".