Cognomen Ondaatje (Ondaatje 
) , in the world, is a rare family name. The last name Ondaatje is characteristic of Australia, where it is a rare surname, Singapore, and Netherlands, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Indonesia, Australia, and the United States.
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| Ondaatje | Netherlands, United Kingdom, United States, Indonesia, Australia |
| pieter philip christiaan ortmaer ondaatje (b. 1804) |
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michael ondaatje Canadian novelist and poet, CA (b. 1943) |
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| kim ondaatje Canadian artist, CA (b. 1928) |
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| christopher ondaatje Businessman, philanthropist, adventurer, writer, CA (b. 1933) |
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| pieter philip juriaan quint ondaatje Philosophiae Dr. et Liberalium Artium Magister Universiteit Utrecht 1782 |
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| pearl ondaatje Sri Lankan radio personality |
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| david ondaatje |
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| anna-marie ondaatje canadian-Sri Lankan rhythmic gymnast, CA |
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