Cognomen Fatafehi (Fatafehi 
) , all around the world, is a rare last name. The cognomen Fatafehi is characteristic of Fiji, 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 Fiji, Australia, and the United States. Much less frequently, Fatafehi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fatafehi | Australia, Canada, New Zealand, United States, Fiji |
| fatafehi 'o lapaha Tongan royalty (b. 1735) |
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| fatafehi fuanunuiava Tongan politician, TO (b. 1765) |
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fatafehi kinikinilau lolomānaʻia fakafānua Tongan noble and politician, TO (b. 1985) |
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| fatafehi ʻalaivahamamaʻo tukuʻaho prince of Tonga, Lord Ma'atu, TO (b. 1954) |
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| fatafehi fuatakifolaha (b. 1944) |
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| mario fatafehi American football player, US (b. 1979) |
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| alipate fatafehi Tongan rugby union player, TO (b. 1984) |
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