Surname Giga (Giga 
, Гига 
, ギガ ) , across the world, is a common family name. The last name Giga is characteristic of Georgia, where it is a common surname, Japan, where it is quite a rare surname, and Latvia. Not in comparison with a country's population, it is the most numerous in Georgia, Japan, and India. Also, Giga is the forename as well as the last name.
| giga mamiev Ossetian poet, GE (b. 1909) |
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| giga japaridze (b. 1924) |
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norbertas giga basketball player, LT (b. 1995) |
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| najma murtaza giga Tanzanian politician, TZ (b. 1967) |
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| giga bukia Georgian politician (b. 1967) |
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| giga agladze Director and filmmaker (b. 1974) |
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| giga chkheidze GE (b. 1965) |
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| yoshikazu giga Japanese mathematician |
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| sabir i giga researcher |
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| giga quparadze Georgian chess player, GE (b. 1987) |
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| giga agladze |
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| giga weidenhammer |
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