Ambrosius Franz was the only son of Ambrosius Adrian,
Freiherr von Viermund zu Neersen (1640–1688), and Johanna Margaretha von Spee (died 1712). He baptised in December 1682. His family seat was Schloss Neersen in today's
Willich in the
Lower Rhine region. He was still a minor when his father died in 1688, and he inherited his father's titles and fiefs as
Freiherr von Viermund and
Lord of Neersen. He reached adulthood in 1699. In 1705, he married Eleonore Magdalena Wilhelmina (1687–1727), daughter of Ernest William,
Count of Bentheim-Tecklenburg-Steinfurt. This marriage gave him access to the higher ranks of the European nobility. In respect of the merits of his uncle General
Damian Hugo von Virmont during the
Great Turkish War, Emperor
Joseph I on 8 September 1706 raised both him and his uncle to Imperial Counts. Following the fashion of the time his family name was altered from
von Viermund to the frenchified
von Virmont. His wife Eleonore died in 1727. After Count Alexander IV. von Velen had died in 1733 the Archbishop and Prince-elector of Cologne
Clemens August of Bavaria enfeoffed him with the
Lordship of Bretzenheim. This Lordship was an
Imperial Estate providing him a seat and vote both in the
Upper Rhenish Circle and in the
Bench of Counts of Westphalia. On 22 August 1738 he was even elected to be the catholic director of the Lower Rhenish-Westphalian Comital College. He furtheron styled himself as "Reichsgraf von und zu Virmont und Bretzenheim". Since the children from his first marriage had all died early and the second marriage had remained childless, the House of Viermund became extinct with his death. On 21 November 1744, he was buried in
Wetzlar Cathedral. After a long legal dispute, his widow finally in 1763 returned the Lordship of Neersen, including Schloss Neersen, to the Electorate of Cologne for a payment of 110,000
florins. The Lordhship of Bretzenheim was given by the Archbishop of Cologne to Ignaz Felix Freiherr von Roll zu Bernau. == Titles ==