Last name Leitão (Leitao 
, Leitão 
, Лейтан 
) , all over the world, is a common surname. The cognomen Leitão is characteristic of Portugal, where it is a common surname, Angola, where it is quite a common surname, and Brazil. Much less frequently, Leitão is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Leitao | Portugal, Brazil, Angola, India, France |
| Leitão | Portugal, Brazil, Angola, France, United States |
| Лейтан | Belarus, Kazakhstan, Russia, Ukraine |
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belchior carneiro leitão Roman Catholic bishop, PT (b. 1516) |
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| pedro leitão PT (b. 1519) |
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francisco de andrade leitão Portuguese diplomat, PT (b. 1585) |
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| bartolomeu leitão Roman Catholic bishop, PT (b. 1540) |
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| antónio leitão Jesuit missionary, born in Macao or China (b. 1578) |
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clemente josé colaço leitão Portuguese priest, PT (b. 1704) |
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antónio josé de lima leitão Portuguese physician, politician, military personnel, writer, translator, teacher and homeopath, PT (b. 1787) |
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| antónio josé osório de pina leitão Portuguese writer, PT (b. 1762) |
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| paulino joaquim leitão Portuguese poet, PT (b. 1779) |
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| manuel duarte leitão Portuguese judge (1784-1856), PT (b. 1784) |
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| luís de loureiro de queirós cardoso do couto leitão PT (b. 1785) |
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| francisco xavier de andrade e almeida pacheco de sousa leitão Portuguese judge (1801-1867), PT (b. 1801) |
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| francisco antónio leitão PT (b. 1794) |
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antónio amaral leitão PT (b. 1845) |
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| antônio vicente de siqueira pereira leitão Brazilian lawyer, BR (b. 1809) |
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