There's no reason why it can't be.
It is the name of an English county.
Devon Iott's birth name is Devon Elizabeth Iott.
Devon Aoki's birth name is Devon Edwenna Aoki.
Devon Beigan's birth name is Devon Rebecca Beigan.
Devon Wright's birth name is Devon Morgan Mills.
Devon Gummersall's birth name is Devon Ryan Gummersall.
Devon Higgs's birth name is Devon Alexander Higgs.
Devon Sawa's birth name is Sawa, Devon Edward.
Devon Newberry's birth name is Devon Barnes Newberry.
Devon Pollard's birth name is Devon Trevor Pollard.
Devon Werkheiser's birth name is Devon Joseph Werkheiser.
Devon Jenkin's birth name is Devon R. Jenkin.