Fabian is the English form of the late Roman name
Fabianus. This was the name given to freed (
emancipated) slaves which originally belonged to a
Roman family with the family (
gens=
clan) name
Fabius, that derived from the
Latin faba for the
broad bean, an important food crop in the
Roman Empire. It entered the English language with the
Normans, but has never achieved the popularity of
Fabien in
France,
Fabio or
Fabiano in
Italy and
Fabián in
Spain.