Throughout the world, Nioko (Nioko 
) is an extremely rare epicene first name. Predominantly, Nioko is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nioko | Japan, Philippines, United States, India, Democratic Republic of the Congo |
Mary, Regina, Divina, Gerald, Gloire, Jessie, Julius, Justin, Tessie, Elaine, Eloisa, Edward, Mariela, Marissa, Marilou, Maylene, Melinda, Silvino, Aldrick, Anthony, Cecilia, Kristin, Rowena, Rommel, Rachel, Ailene, Myra, Alex, Rona, Ryan, Joel, Edna, Irma, Angel, Armie, Romeo, Raymond, Ruffa, Lorna, Jeric, Julie, Erric, Enita, Vilma, Vince, Felix, Manuel, Anasol, Grace, and Rodolfo