I don't think Forrest Griffin has a middle name because I could not find any on the internet. Maybe he has one, but it isn't known to the public. He is an active MMA Fighter who is currently signed up to the UFC. His career has spanned over a decade and he has won a total of 19 of his fights.
Forrest Gump's middle name is 'George'. 'Forrest George Gump'
his full name is Forrest Emerson Burnham so his middle name is Emerson.
Since griffins are mythical and do not exist, there is no official name fro a group.
family guy
Forrest Seabury's birth name is Seabury, Sumner Forrest.
Forrest Pruett's birth name is Forrest Wayne Pruett.
Forrest Sherman's birth name is Sherman, Forrest Percival.
Forrest Tucker's birth name is Forrest Meredith Tucker.
Forrest Halsey's birth name is Halsey, William Forrest.
Forrest Huff's birth name is William Forrest Huff.
Allan Forrest's birth name is Fisher, Allan Forrest.
Forrest Wilson's birth name is Robert Forrest Wilson.