Last name Roo (Roo 
, رو 
, Ро 
) , all around the world, is a common family name. The cognomen Roo is characteristic of Malaysia, where it is quite a common surname, Netherlands, and Belgium. Not in comparison with a country's population, it is commonest in Malaysia, Egypt, and Netherlands. Likewise, Roo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Roo | Egypt, Malaysia, Netherlands, Belgium, Myanmar |
| رو | Egypt, Algeria, Sudan, Iraq, Saudi Arabia |
| Ро | Kazakhstan, China, Azerbaijan, Ukraine, Russia |
| Роо | Ukraine, Russia, Kazakhstan, Belarus |
Lu, Rauw, Rest, Ro, Roò, Roó, Roô, Roõ, Roǿ, Ru, Ruhe, Ruve, Ròo, Ròò, Ròó, Róo, Róò, Róó, Róô, Rôo, Rôò, Rôó, Rôô, Rôõ, Rõo, Rõò, Rõó, Rõô, Rõõ, Rõō, Rā, Rō, Rōo, Rōõ, Rōō, Rőo, Rőő, Rǿǿ, Unruly, Ŕoo, Ŕòò, Ŕóò, Ŕóó, Ŕôô, Ŕőo, Ŕőő, Ŗǿǿ, Řoo, Řoó, Řòò, Řòó, Řóò, Řôo, Řôô, Řôõ, Řõõ, Řŏŏ, Řőő, Роьо, Ру, רוו, روو, ชะหนู, หนูเอก, រោ, រ៉ោ, រ៊ោ, ル, ルー, ロー, and 儿喔喔
| gerardus de roo 1622 - 1681 (b. 1622) |
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| antoon lodewijk de roo 1684 - (b. 1684) |
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| jean barthélémie van roo BE (b. 1716) |
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| lodewijk frans emanuel van roo (b. 1785) |
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| peter deroo Belgian historian, BE (b. 1839) |
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| roo dorr Australian rugby union player, AU (b. 1909) |
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| william a. van roo (b. 1915) |
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| joseph de roo Belgian translator (1932-2001) (b. 1932) |
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| antoon emeric marcel de roo Belgian ornithologist (1936–1971), BE (b. 1936) |
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roo panes British singer-songwriter, GB (b. 1988) |
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| johan de roo Belgian politician, BE (b. 1948) |
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| roo borson Canadian poet, CA (b. 1952) |
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| alain de roo Belgian bicycle racer, BE (b. 1955) |
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| greet de roo Belgian politician, BE (b. 1960) |
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| henk de roo NL (b. 1954) |
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