Family name Ritvo (Ritvo 
) , worldwide, is a rare cognomen. The cognomen Ritvo is habitual in Finland, where it is a rare surname, Argentina, and the United Kingdom, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in the United States, Argentina, and the United Kingdom.
| VARIANT | COUNTRY |
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| Ritvo | Finland, Argentina, Brazil, United Kingdom, United States |
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edward ross ritvo American psychiatrist (1930-2020) (b. 1930) |
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harriet ritvo American historian, US (b. 1946) |
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| max ritvo LT (b. 1897) |
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katherine ritvo American horse trainer (b. 1969) |
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max ritvo American poet (1990-2016), US (b. 1990) |
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| rosemary ritvo American screenwriter, US (b. 1953) |
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| eva ritvo American psychiatrist (b. 1961) |
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| sarah ritvo researcher (ORCID 0000-0002-1889-5194) |
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| paul ritvo researcher |
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| paul-gydeon g ritvo researcher |
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| barbara ritvo |
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Mr, Susan, Scott, Alyse, Chris, Cesar, Berta, Karen, Pedro, Roger, Deena, David, Dalia, Diana, Donna, Leila, Lital, Jacob, Jared, Jorge, Jesse, Julio, Sarah, Jukka, Molly, Zeev, Ms, Max, Ana, Avi, Gad, Eva, Zvi, Soro, Skye, Alan, Ayal, Paul, Riva, Gene, Lori, Jose, Juan, Elsa, Eric, Fred, Ivan, Maria, and Norma