Fabian

Fabian is the English form of the late Roman name Fabianus. This was a name originally given to those adopted into or descended through the female line from a Roman family named Fabius, that derived from the Latin faba for the broad bean, an important food crop in antiquity. It entered the English language with the Normans, but has never achieved the popularity of Fabien in France, Fabio or Fabiano in Italy and Portugal, and Fabián in Spain.

Biography summary from English Wikipedia.