What is "tanche"

The Tanche, probably the best known French olive cultivar, is grown primarily in the Drôme and Vaucluse regions of southern France. It is often referred to as a perle noire, the "Black Pearl of Provence". The Tanche is said to have been introduced to France by the Greeks of Massilia, around the fourth century BC.

Tanche and Tank (other spellings are Tanch, Tanke, Tanck, and Tancke) is the name of one or more Dano- Norwegian families. One of those is originating from Haderslev.

There are several persons by the name Tanche and similar spellings in Denmark, Norway and Germany. The tradition says that a German by the name Tanche was ennobled by Charles IV of the Holy Roman Empire (reign: 1346–78). It is not known whether Martin Tanche, who was ennobled by the King of Denmark and Norway, belonged to the same families as the Norwegian families Tanche and Tank.