Oaks Howard Grady
Obi-Gwacham Nwaobiara
Obi-gwacham Oby
Ogunwo Susannah
Ohadugha Godfrey
Ojo Babatunde A.
Okonkwo Ifeyinwa
Okoroafor Kingsley U.
Okoye Obiefuna P.
Okumagba Enanore
Olivito Francesco R.
Olson David Nels
Oseki Collins O.
Osenbach Richard K.