Cognomen Oketch (Oketch 
) , worldwide, is a common last name. The surname Oketch is habitual in Kenya, where it is quite a common surname, Uganda, where it is quite a rare surname, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Sub-Saharan Africa, particularly Kenya, Uganda, and Tanzania. Very seldom, Oketch is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Oketch | Tanzania, Kenya, United Arab Emirates, United States, Uganda |
| john w oketch researcher (ORCID 0000-0002-8020-0787) |
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| patrick oketch Kenyan actor (born 1981), KE |
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| sandra y oketch researcher (ORCID 0000-0002-7328-0301) |
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| maryanne oketch Canadian reality television participant, CA (b. 1997) |
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Mr, Jack, John, Joab, Joel, Jeff, Nana, Nick, Elon, Eric, Emma, Ezra, Hada, Fred, Yuri, Moses, Mercy, Mirja, Sarah, Sammy, Silas, Simon, Luke, Steve, Dina, Rita, Ms, Sam, Ann, Ben, Bob, Ken, Dan, Dia, Joy, Tom, Zoe, Mary, Mark, Seth, Alex, Anne, Abel, Amos, Bill, Paul, Rose, Ruth, and Smith