Gera in Smiths Bible Dictionary
(a grain), one of the "sons," i.e. descendants, of Benjamin.
Ge 46:21 Gera, who is named, Jud 3:15 as the ancestor of Ehud,
and in 2Sa 16:5 as the ancestor of Shimei who cursed David, is
probably also the same person (though some consider them
different persons).
Read More about Gera in Smiths Bible Dictionary