Otto is a very prominent first name for men (#504 out of 1220, Top 41%) and also a very prominent last name for all people (#1483 out of 150436, Top 1%). Otto reached its apex rank of #67 in the U.S. in the 1880s, and is at #543 presently.
Triangular trade started in the mid-15th century. Trading took place between America, Europe and Africa. It was also referred to as the Trans-Atlantic trade, as the route used to conduct this trade was on the Atlantic Ocean.
This forms a triangle on the map, hence the term Triangular Trade.. New England slave ships took vats of the rum from their distilleries to Africa and bought African slaves from African owners/dealers with the rum.