- Name - OBA
Meaning - FATHER
- Name - OBADELE
Meaning - THE KING ARRIVES
- Name - OBAFEMI
Meaning - THE KING LIKES ME
- Name - OBATAIYE
Meaning - KING OF THE WORLD
- Name - OBOI
Meaning - SECOND SON
- Name - ODAI
Meaning - THIRD SON
- Name - ODE
Meaning - BORN ALONG THE ROAD
- Name - ODION
Meaning - FIRSTBORN OF TWINS
- Name - OGBONNA
Meaning - IMAGE OF HIS FATHER
- Name - OGORCHUCKWU
Meaning - GIFT OF GOD
- Name - OJORE
Meaning - A MAN OF WAR
- Name - OJUNEKU
Meaning - THE LORD HAS SPOKEN
- Name - OKANG
Meaning - FIRST SON
- Name - OKECHUKU
Meaning - GOD'S GIFT
- Name - OKO
Meaning - ELDER OF TWINS
- Name - OKPARA
Meaning - FIRST SON
- Name - OLA
Meaning - WEALTH
- Name - OLADELE
Meaning - WEALTH ARRIVES
- Name - OLAFEMI
Meaning - WEALTH FAVORS ME
- Name - OLAMINA
Meaning - THIS IS MY WEALTH
- Name - OLANIYAN
Meaning - HONOR SURROUNDS ME
- Name - OLATUNJI
Meaning - HONOR REAWAKENS
- Name - OLU
Meaning - PREEMINENT
- Name - OLUBAYO
Meaning - HIGHEST JOY
- Name - OLUCHUCKWU
Meaning - THE HANDYWORK OF GOD
- Name - OLUFEMI
Meaning - GOD LOVES ME
- Name - OLUJIMI
Meaning - GOD GAVE ME THIS
- Name - OLUSHOLA
Meaning - GOD HAS BLESSED
- Name - OLUWA
Meaning - OUR LORD
- Name - OLUYEMI
Meaning - FULFILLMENT FROM GOD
- Name - OMAR
Meaning - THE HIGHEST
- Name - OMARI
Meaning - KING
- Name - OMARION
Meaning - KING FOREVER
- Name - OMOREDE
Meaning - PRINCE
- Name - ONIPEDE
Meaning - THE CONSOLER IS COME
- Name - ONYOKA
Meaning - WHO IS THE GREATEST?
- Name - OREE
Meaning - CORNCAKE
- Name - ORJI
Meaning - MIGHTY TREE
- Name - ORLANDO
Meaning - LAND OF GOLD
- Name - OSAGBORO
Meaning - THERE IS ONLY ONE GOD
- Name - OSAHAR
Meaning - GOD HEARS
- Name - OSAKWE
Meaning - GOD AGREES
- Name - OSAYABA
Meaning - GOD FORGIVES
- Name - OSAYANDE
Meaning - GOD OWNS THE WORLD
- Name - OSAYIMWESE
Meaning - GOD MADE ME WHOLE
- Name - OSAZE
Meaning - WHOM GOD LIKES
- Name - OSEI
Meaning - NOBLE
- Name - OTHIAMBO
Meaning - BORN IN THE AFTERNOON
- Name - OTHIENO
Meaning - BORN AT NIGHT
- Name - OTTAH
Meaning - CHILD THIN AT BIRTH
- Name - OZA
Meaning - METAL
- Name - OZOMA
Meaning - ANOTHER GOOD ONE