Names Fidelis Okopujie through Oleksandr Oksenyuk
- Fidelis Okopujie-Irene Okora
- Isaac Okora-Ekenee Okorafor
- Ekpe Okorafor-Vicent Okorafor
- Victor Okorafor-Henry Okorator
- James Okorator-Everister Okordudu
- George Okordudu-Jeanetta Okoreeh
- Jessica Okoreeh-Harry Okoren
- Heidi Okoren-Jeannie Okorfor
- Kenneth Okorfor-Antonia Okorie
- Anyafulu Okorie-Davina Okorie
- Davis Okorie-Jamie Okorie
- Jane Okorie-Monday Okorie
- Monique Okorie-Roselyn Okorie
- Rosemary Okorie-Ugochi Okorieobijiofor
- Judy Okorieocak-Irene Okorlatowych
- Demotrielle Okorlawoodall-Celeste Okorn
- Chirs Okorn-Nick Okorn
- Niyenodo Okorn-Vicki Okornijtschu
- Barbara Okornik-Alexina Okoro
- Alexis Okoro-Brain Okoro
- Brandan Okoro-Chinodum Okoro
- Chinomso Okoro-Davita Okoro
- Davon Okoro-Eugharia Okoro
- Eunice Okoro-Ifedina Okoro
- Ifeoma Okoro-Karyna Okoro
- Kasie Okoro-Maxwell Okoro
- Maya Okoro-Oasru Okoro
- Obarakpor Okoro-Paatricia Okoro
- Pablo Okoro-Sogbeye Okoro
- Sokoh Okoro-Vera Okoro
- Veracruz Okoro-Charlie Okoroafor
- Charrene Okoroafor-Linus Okoroafor
- Lisa Okoroafor-Chi Okoroama
- Chidera Okoroama-Godffrey Okorocha
- Godfre Okorocha-Amira Okorodudu
- Amiraoritse Okorodudu-Chibueze Okoroego
- Collins Okoroego-Chase Okoroha
- Chiamaka Okoroha-Chiafukam Okoroji
- Chichi Okoroji-Roderick Okoroji
- Rose Okoroji-Donald Okoroma
- Edna Okoroma-Catherine Okoronko
- Donna Okoronko-Dibugwu Okoronkwo
- Dingo Okoronkwo-Lawrence Okoronkwo
- Lemachi Okoronkwo-Samantha Okoronkwo
- Samps Okoronkwo-Amelia Okoronwo
- Brown Okoronwo-Liz Okoroski
- Michael Okoroski-Chase Okorowski
- Chasse Okorowski-Yulia Okorshunova
- Anne Okorski-Micheal Okorue
- Victoria Okoruele-Faith Okos
- Ferenc Okos-Fred Okoschack
- Manfried Okoschack-Denise Okoshi
- Elizabeth Okoshi-Comfort Okosi
- Debs Okosi-Sylvia Okositheophilus
- Dennis Okositzke-Tim Okoskinen
- Timo Okoskinen-Delbert Okoson
- Edward Okoson-Fred Okoster
- Gladys Okoster-Edobor Okosun
- Edoro Okosun-Winifred Okosun
- Zainab Okosun-Stephen Okota
- Tara Okota-Derrick Okotete
- Djuana Okotete-Erica Okoth
- Erick Okoth-Philip Okoth
- Pius Okoth-Amos Okothtolo
- Udaya Okothuru-Sophia Okotie
- Stella Okotie-Edna Okoto
- Elizabeth Okoto-Glenette Okott
- Ijeoma Okott-Robert Okotzin
- Marion Okotzurbarrington-Heleikanoenoeuakea O
- Heleikanoeualke Okouchi-Juliac Okougbody
- Omon Okougbody-Eugene Okoun
- Galina Okoun-Masae Okoura
- Michael Okoura-Mike Okouyoumjian
- Ardaches Okouyoundian-Obiageli Okove
- Regina Okove-Solly Okowa
- Solomon Okowa-Lakisha Okowi
- Nkechi Okowi-George Okowitz
- Heidi Okowitz-Abimbola Okoya
- Abiodun Okoya-Jackson Okoyama
- Jay Okoyama-Asam Okoye
- Asatu Okoye-Chigozie Okoye
- Chijioke Okoye-Dan Okoye
- Daniel Okoye-Felicia Okoye
- Felix Okoye-Jacqueline Okoye
- Jacqulina Okoye-Lawson Okoye
- Laylah Okoye-Neka Okoye
- Nellie Okoye-Osita Okoye
- Ositadima Okoye-Stan Okoye
- Stanley Okoye-Zebede Okoye
- Zebedee Okoye-Fredrick Okoyier
- Thomas Okoyier-Nikki Okozabe
- Edelita Okozachenko-Alexandra Okozlova
- Olena Okozlova-Rose Okpadu
- Chinwe Okpaduwa-Seong Okpak
- So Okpak-Anthonia Okpala
- Anthony Okpala-Ekene Okpala
- Elisha Okpala-Mikegabriel Okpala
- Mirian Okpala-Vivian Okpala
- William Okpala-Nneka Okpalaoka
- Osita Okpalaoka-Ednarine Okpali
- Favor Okpali-Pamela Okpaly
- Joseph Okpamachi-Godwin Okpanyi
- Bryan Okpaoa-Chinwe Okpara
- Chinyere Okpara-Johnbull Okpara
- Johnnie Okpara-Otonyemieba Okpara
- Oyindamola Okpara-Livinity Okparaeke
- Ngozi Okparaeke-Thabiti Okparasims
- Kwanz Okparastewartskinner-Erdogan Okpayer
- Crystal Okpayo-Adeleine Okpealuk
- Alexandria Okpealuk-Ikponmwosa Okpefe
- Anthony Okpegbue-John Okperuvwe
- Oghenetanure Okperuvwe-Georgina Okpiaru
- Miracle Okpiaru-Augustine Okpo
- Brianna Okpo-Luba Okpodu
- Makeda Okpodu-Emeka Okpokiri
- Iyowuna Okpokiri-Patrica Okpokwasili
- Patricia Okpokwasili-Tarilado Okponya
- Helen Okponyi-Gideon Okpowruk
- Hannah Okpowruk-Chinedum Okpukparahanson
- Chinedo Okpukpura-Fred Okpuzor
- Ifeoma Okpuzor-Chong Okquarles
- Wynn Okqzaki-Andrew Okraay
- Frances Okraay-Sharon Okrafkaanderson
- Davidson Okrafo-Mich Okragleski
- Michael Okragleski-Arisemma Okrah
- Augusta Okrah-Wendy Okrah
- Yaa Okrah-Michael Okrak
- Mike Okrak-Nadia Okraku
- Nan Okraku-Evelyn Okramer
- Francis Okramer-Barbara Okramos
- John Okramp-Fred Okrannig
- Harold Okrannig-William Okraro
- Jack Okrarodman-Edward Okrasinsk
- Fay Okrasinsk-Helen Okrasinski
- Helena Okrasinski-Sherri Okrasinski
- Sherry Okrasinski-Richard Okraska
- Robert Okraska-Andrew Okrastins
- Andrews Okrastins-Carolyn Okratzer
- Gene Okratzer-Kathryn Okrause
- Kenneth Okrause-Jiovina Okravagna
- Ramon Okravagna-Bridget Okray
- Brittan Okray-Gwynne Okray
- Hank Okray-Lauren Okray
- Laurence Okray-Ronnie Okray
- Rory Okray-Bridget Okrayhunt
- Olatunde Okrayi-Judith Okrebs
- Kerry Okrebs-Marek Okreglak
- Margie Okreglak-Mary Okreill
- Gerald Okreim-Steven Okrem
- Brandon Okremba-Alyssa Okrent
- Amalia Okrent-Marc Okrent
- Margie Okrent-Alma Okrenz
- Dwayne Okrenz-Phillis Okrepkie
- Phyllis Okrepkie-Joseph Okresik
- Joshua Okresik-Leonardo Okretich
- Gregory Okretish-Sloan Okreyanderson
- Bernadine Okreye-James Okrider
- Jeffrey Okrider-Kayoko Okrieger
- Kim Okrieger-Dawn Okrin
- Dennis Okrin-Dave Okrio
- Elizabeth Okrio-Nels Okristofferson
- Robert Okristofferson-Phillip Okrock
- Charlie Okrocker-Robert Okrogly
- Ryan Okrogly-Jacquelin Okroi
- Jacqueline Okroi-Ogheniroro Okrokoto
- Oluremi Okrokoto-Catherine Okrom
- Franklin Okrom-Jeff Okrongley
- Joe Okrongley-Herbert Okrongly
- Hugo Okrongly-Jane Okronlis
- Morris Okronlokken-Jaseph Okros
- Jason Okros-Robert Okrouse
- Tambree Okrouse-Michelle Okroyd
- Mark Okroydorina-Mary Okruchmccann
- Mary Okruchphillips-Jennifer Okrueger
- Jessie Okrueger-Jason Okruger
- Jean Okruger-Buck Okruhlik
- Caroline Okruhlik-James Okruhly
- Katherine Okruhly-Pia Okrupa
- Jane Okrupacs-Waldo Okruse
- Wesley Okruse-Tho Okruszynski
- Thomas Okruszynski-Stephan Okruw
- Stephen Okruw-Robert Okrzefik
- Dean Okrzeik-Margaret Okrzesik
- Mariamne Okrzesik-Devon Okrzynski
- Donley Okrzynski-Gregory Oks
- Guenadi Oks-Sarah Oks
- Sdamislav Oks-Marilyn Oksa
- Marissa Oksa-Kachur Oksama
- Kharlova Oksama-Fedorova Oksana
- Fedyuk Oksana-Nevistyuk Oksana
- Nguyen Oksana-Zsholobchuk Oksana
- Zukofi Oksana-Krystal Oksanen
- Laura Oksanen-Luba Oksanknysh
- Asiryan Oksanna-Kimberly Oksavik
- Kjellmar Oksavik-Babakjanian Oksen
- Babkhanian Oksen-Gorge Oksenberg
- Gracey Oksenberg-Lois Oksendahl
- Lorelei Oksendahl-Michael Oksengorn
- Mikhael Oksengorn-Jadwiga Okseniuk
- Lillian Okseniuk-Oleksandr Oksenyuk