He has produced three witnesses to prove that her marriage was conducted in accordance with the Luo customary laws.
Mr Olweny, a land surveyor who died in 2016, owned properties in different parts of the country worth millions of shillings.
Three witnesses said that Mr Olweny paid a dowry of 12 cows and Sh160,000 to Ms Atieno’s parents.
A woman who is fighting for control and a share of the late Nakuru tycoon Eliakim Washington Olweny's wealth is now fighting to prove her marriage to the businessman.
Ms Norah Atieno, who claims she was the second wife of Mr Olweny, has produced three witnesses to prove that her marriage was conducted in accordance with the Luo customary laws and had met all requirements.