Ulrich Fredrich von Cappelen grew up in at Mæla Manor in
Gjerpen (
Mæla gård i Gjerpen) in the municipality of
Skien in
Telemark. He was one of the sons of the wholesaler, timber merchant and ship owner Diderich von Cappelen (1734–1794) and his first wife Petronelle Pedersdatter Juel (1737–1785). He had two older brothers,
Diderik von Cappelen and
Peder von Cappelen, a sister and one younger half-brother.{{cite web In 1793 he married Benedicte Henrikke Aall (1772–1812), daughter of
Nicolai Benjamin Aall and Amborg Jørgensdatter, née Wesseltoft. The couple had nine children, many of whom became noteworthy citizens. The sons
Nicolai Benjamin and
Ulrik Frederik became jurists and members of the national parliament. The third son, Wittus Juel, became a merchant in
Drammen. The daughters Didricha and Louise were married consecutively to bishop and politician
Jens Lauritz Arup. The fourth daughter Benedicte married her cousin Hans Blom Cappelen; their son
Didrik became a member of parliament while their daughter Marie married
Fritz Trampe Flood of the notable Flood ship-owner family. Their fourth son
Jørgen Wright Cappelen moved to
Kristiania (now Oslo) and founded the publishing house
J.W. Cappelens Forlag. Except for Nicolai Benjamin, they all have descendants living in Norway today. ==Career==