The Amsinck family is a Dutch-origined patrician family whose members were prominent merchants in multiple countries including the Netherlands, Hamburg, Portugal, England, France, Hanover, Holstein, Denmark, Suriname and India. From the 17th century the Hamburg branch of the family formed part of the city-state's ruling class, the Hanseaten or hereditary grand burghers, who enjoyed legal privileges in Hamburg until 1918. Amsinck has been one of Hamburg's great business families over many centuries, and its members reached the highest positions in Hamburg society, including as senators and head of state. A branch of the family were large plantation owners in Suriname. The Hamburg branch retained a Dutch identity for centuries, often intermarrying with other Dutch-origined patrician families.
The family is descended from Johan Amsinck (born ca. 1410–1430), a burgher of Oldenzaal in 1459. His grandson Rudolph Amsinck (1518–1582/90) was Mayor of Zwolle.
The flowering plant genus Amsinckia is named after the family in honour of the Hamburg head of state and patron of botany Wilhelm Amsinck (1752–1831).[1]