He converted to
Catholicism and, on 5 May 1839, married Petronilla Antonia Cäcilia ( von Rhò) Ordioni (1815–1898) in Milan. The marriage was later found to be invalid due to a legal defect when it was conducted, so they married again Vienna on 8 April 1850. Petronilla, a daughter of Anton Maria von Rhò and widow of Pietro Ordioni (who died in 1835), was from an
aristocratic Italian family. Together, they were the parents of: •
Hugo August Peter von Hofmannsthal (1841–1915), a director of the
Boden-Credit-Anstalt who married Anna Maria Josefa Fohleutner, a daughter of Laurentz Fohleutner (whose family came to Vienna from the
Sudetenland via
Bavaria). • Sylvius
Silvio Arvinius Leo von Hofmannsthal (1852–1921), an engineer who married Emerica Albertina "Emma"
Burián von Rajecz, a member of an ancient
Hungarian noble family. •
Guido von Hofmannsthal (1854-1925), an art collector and banker with
Wiener Bankverein who married Franziska "Fanny" Opatalek-Treis in
Bad Ischl in 1885. Hofmannsthal died on 31 August 1881 at
Krems in
Lower Austria. ==Notes==