Oasis members 10 names
Oasis songs 11 names
occupations 158 names
ocean 148 names
ocean deities 34 names
Octavia E. Butler characters 76 names
Odyssey characters 17 names
Ogre Battle characters 36 names
Old Norse words 1 name
old people 51 names
Olivia the Pig characters 22 names
Olympians 16 names
OMORI characters 75 names
Once Upon a Time characters 123 names
One Direction members 6 names
One Piece characters 129 names
one syllable 542 names
opera 74 names
opera singers 97 names
orange 47 names
Originals characters 1 name
Orthodox saints 688 names
Oscar Wilde characters 69 names
Ottoman royalty 6 names
Ottoman sultans 8 names
Our Flag Means Death characters 29 names
Ouran High School Host Club characters 14 names
Outlast 2 characters 14 names
Outlast characters 7 names
Outlaw Star characters 19 names
Over the Moon characters 2 names
Overwatch characters 57 names
Owari no Seraph characters 7 names
Oz characters 72 names
Ozark characters 34 names