Last name Portnow (Портнов 
, Portnow 
) , around the world, is quite a common cognomen. The cognomen Portnow is habitual in Russia, where it is quite a rare surname, Kazakhstan, and Belarus. Measured by absolute frequency, this name is the most popular in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Портнов | Russia, Kazakhstan, Ukraine, Kyrgyzstan, Belarus |
| Portnow | Canada, Germany, United Kingdom, China, United States |
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neil portnow American music executive, US (b. 1948) |
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| richard portnow American actor, US (b. 1947) |
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| marjorie anne portnow (b. 1943) |
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| james portnow writer, game designer and consultant |
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| leah h portnow researcher |
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| stanley l. portnow member or fellow of the New York Academy of Medicine |
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| jana portnow researcher |
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| marjorie portnow |
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Al, James, Nancy, Heidi, Martha, Samuel, Sylvia, Arthur, Keilly, Robert, Lauren, Lester, Jazmin, Howard, Marilyn, Matsuyo, Stephen, Stanley, Allison, Kathryn, Richard, Douglas, Lloyd, Loren, Gayle, David, Ed, Ann, Art, Kit, Jay, Jon, Mark, Adam, Kara, Ruth, Jeffrey, Gary, Luke, Jana, John, Jeff, Nina, Neil, Hugh, Faye, Mazal, Carly, Leah, and Theresa