Cognomen Sidharta (Sidharta 
) , across the world, is a common family name. The cognomen Sidharta is characteristic of Indonesia, where it is quite a rare surname, Singapore, where it is a rare surname, and Australia. In absolute terms, it most frequently occurs in Indonesia, Mexico, and Australia. Much less frequently, Sidharta is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sidharta | Australia, India, United States, Indonesia, Mexico |
| myra sidharta Indonesian writer, ID (b. 1927) |
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| gregorius sidharta Indonesian artist, ID (b. 1932) |
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| priguna sidharta ID (b. 1924) |
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| otto sidharta Indonesian musician, ID (b. 1955) |
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| ida bagus gde sidharta ID (b. 1964) |
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| sidharta utama ID (b. 1965) |
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| sidharta adyatma ID (b. 1967) |
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| amir sidharta Indonesian artist, ID |
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| kenny dwi sidharta researcher |
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| sidharta gautama researcher ORCID ID = 0000-0001-5628-6974 |
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| harry sidharta Indonesian political candidate, ID |
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| samuel l sidharta researcher |
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| eka ananta sidharta (b. 1972) |
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| raditya sidharta |
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