Maoi Arroyo: The Impact of 'I' | Philstar.com
From the start, she was unique. Christened “Maria Antonia Odelia” by her late parents Joker and Odelia Arroyo, she says she couldn’t have been nicknamed “MAO,” especially because her lawyer-father was jailed during martial law. So Joker Arroyo added an “I” to his eldest daughter’s initials and her nickname “MAOI” was born.
Source: philstar.com