Surname Oak (Oak 
, Oaka 
, オーク ) , worldwide, is quite a common last name. The cognomen Oak is habitual in Myanmar, where it is quite a rare surname, New Zealand, where it is a rare surname, and Australia. In absolute terms, it is the most numerous in India, Myanmar, and the United States. More prevalently, Oak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oak | Myanmar, United Kingdom, United States, India, Ghana |
| Oaka | Myanmar, Egypt, United Kingdom, United States, Japan |
| オーク | Japan |
| vidyadhar govind oak Indian judge, IN (b. 1909) |
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| vasantrao oak Indian politician (1914-2000) (b. 1914) |
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raven oak American singer and author, US (b. 1977) |
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amar oak Indian bansuri player |
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| manohar shankar oak Indian writer, IN (b. 1933) |
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winona oak Swedish singer-songwriter, SE (b. 1994) |
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| shashikant oak Indian Air Force officer and writer, IN (b. 1949) |
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| darrell oak American soccer player, US (b. 1954) |
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| kil-sung oak (b. 1945) |
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| sanjay oak Indian surgeon, IN (b. 1959) |
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| cindy oak alpine skier, US (b. 1961) |
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| sung-deuk oak (b. 1958) |
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| oak sundar Indian actor, IN (b. 1975) |
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| oak grove jane doe Unidentified murder victim |
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| mandar prafullachandra oak Ph.D. Cornell University 2002 |
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