Worldwide, Castro (Castro 
, كاسترو 
, カストロ 
, and others...) is a common principally boy's, but very infrequently female first name. The forename Castro is habitual in Guadeloupe, where it is quite a common male name, Luxembourg, where it is quite a rare epicene name, and Guatemala. Measured by absolute frequency, it is commonest in Philippines, Tanzania, and Angola. Much more prevalently, Castro is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castro | Philippines, Colombia, Brazil, Mexico, Argentina |
| كاسترو | Iraq, Sudan, Yemen, Syria, Algeria |
| カストロ | Japan |
| Кастро | Belarus, Kyrgyzstan, Russia, Ukraine |
| קסטרו | Israel |
Alcázar, Castra, Castrate, Castrò, Castró, Castrô, Castrõ, Castrő, Caštro, Crastu, Càstro, Càstrò, Cástro, Cástrò, Cástró, Cáśtŕó, Câstro, Câstrô, Câstrō, Câštrô, Cãstro, Cãstrô, Cãstrõ, Guillade, Guillar, Kastro, Ćastro, Ċastro, Častro, Čâstrô, Čâštrô, Де, Кастра, Каштру, Цастро, کاسترو, and คาสโตร
Castro is also a name for the fictitious and mythical characters: Castro , the operatic character in the opera Al gran sole carico d’amore, Al gran sole carico d'amore and Castro Gomes , character in Os Maias.
| guterre rodríguez de castro - 1194 (b. 1150) |
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| león de castro Spanish theologian, ES (b. 1500) |
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| garci ruiz de castro 16th-century Spanish historian, ES (b. 1513) |
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| bento de castro Jesuit scholastic, PT (b. 1543) |
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guillén ramón de moncada y castro Spanish military personnel, ES (b. 1619) |
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dinis melo e castro Portuguese politician (1624-1709), PT (b. 1624) |
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| alonso núñez de castro 17th-century Spanish chronicler, ES (b. 1627) |
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| bernabé de castro IT (b. 1644) |
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| caetano de melo e castro PT (b. 1680) |
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silva castro BR (b. 1792) |
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| inácio pinto de almeida castro politician, BR (b. 1766) |
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cesareo castro Mexican politician and military personnel (1856-1944), MX (b. 1856) |
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| urbano de castro Musician (b. 1850) |
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plácido castro Spanish translator, ES (b. 1902) |
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morris fidanque de castro Governor of the United States Virgin Islands (1902-1966), US (b. 1902) |
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