Cognomen Widia (Widia 
) , throughout the world, is a common last name. The last name Widia is characteristic of Indonesia, where it is quite a rare surname, Hong Kong, where it is a rare surname, and Taiwan. Measured by absolute frequency, it is the most numerous in Indonesia, the Democratic Republic of the Congo, and Taiwan. Also, Widia is the forename as well as the last name.
| mamie agigba widia DRC politician, CD (b. 1974) |
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| mirta widia researcher (ORCID 0000-0003-3726-6868) |
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| fina widia researcher |
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| i gusti agung putu widia Indonesian political candidate, ID |
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| i wayan widia ID (b. 1972) |
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