Last name Tregoning (Tregoning 
) , in all the world, is quite a rare family name. The family name Tregoning is habitual in Australia, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and Australia.
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| Tregoning | United Kingdom, France, United States, South Africa, Australia |
| joseph tregoning British printer, bookseller and stationer, in Truro, Cornwall, GB (b. 1763) |
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| john simmons tregoning (born 1814) (b. 1814) |
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| william henry tregoning (born 1816) (b. 1816) |
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| john tregoning American mechanical engineer, inventor and business manager, US (b. 1840) |
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| john simmons tregoning (1842-1909) (b. 1842) |
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| sophia e. tregoning (born 1870) (b. 1870) |
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| william edward cecil tregoning (born 1871) (b. 1871) |
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| william edward cecil tregoning Welsh industrialist (1871-1957), GB (b. 1871) |
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| emily g. tregoning (born 1873) (b. 1873) |
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| arthur l. tregoning (born 1875) (b. 1875) |
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| dorothea tregoning (born 1878) (b. 1878) |
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| william leonard tregoning (1902-1991) (b. 1902) |
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| george edward tregoning (born 1904) (b. 1904) |
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| ethel dorothea tregoning Peerage person ID=613604 (b. 1908) |
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| john langford tregoning (1909-1976) (b. 1909) |
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