Worldwide, Simionescu (Simionescu 
) is a rare unisex given name. The given name Simionescu is habitual in Eastern Europe, particularly Romania, where it is quite a rare gender-neutral name. More prevalently, Simionescu is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Simionescu | Belgium, Italy, United States, Romania, Morocco |
| marin simionescu-râmniceanu Romanian literary critic (1883-1964), RO (b. 1883) |
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| cristofor i. simionescu RO (b. 1920) |
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| bogdan simionescu Romanian chemist, RO (b. 1948) |
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| radu simionescu film editor |
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