Last name Diaconescu (Diaconescu 
, Дьяконеску 
, Диаконеску 
) , globally, is a common family name. The surname Diaconescu is habitual in Romania, where it is quite a common surname, Moldova, where it is quite a rare surname, and Ireland, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Romania, Italy, and the United States. Very seldom, Diaconescu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diaconescu | Italy, Moldova, United States, Afghanistan, Romania |
| Дьяконеску | Ukraine |
| Диаконеску | Kazakhstan, Russia |
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ion diaconescu Romanian politician (1917-2011), RO (b. 1917) |
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ioana diaconescu Romanian poet, RO (b. 1947) |
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| nicolae diaconescu RO (b. 1893) |
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cristian diaconescu Romanian politician, RO (b. 1959) |
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camelia diaconescu Romanian rower, RO (b. 1963) |
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| ion diaconescu Romanian painter (1915-1945), RO (b. 1915) |
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dan diaconescu Romanian journalist, politician, television station founder and owner, RO (b. 1967) |
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| dumitru diaconescu (b. 1908) |
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| mircea daniel diaconescu politician, RO (b. 1925) |
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andrei diaconescu co-founder and co-chief Executive Officer of One United Properties, RO (b. 1975) |
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| mircea diaconescu composer, RO (b. 1929) |
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paula l diaconescu Romanian-American chemistry professor |
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| maria diți-diaconescu Romanian javelin thrower, RO (b. 1937) |
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| dumitru diaconescu Romanian politician, RO (b. 1938) |
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| ion diaconescu (b. 1930) |
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