Cognomen Sumsion (Sumsion 
) , globally, is a rare last name. The family name Sumsion is habitual in Isle of Man, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Australia.
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| Sumsion | Belgium, United Kingdom, Australia, United States, Canada |
| herbert sumsion English musician and composer, organist of Gloucester Cathedral, GB (b. 1899) |
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| calvin j. sumsion graphic designer, US (b. 1942) |
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| terry sumsion Canadian singer, CA (b. 1947) |
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| david peter sumsion (born 1958), GB (b. 1958) |
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| virginia sumsion (born 1960), GB (b. 1960) |
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| lucy sumsion (born 1963), GB (b. 1963) |
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| daniel sumsion (born 1967) (b. 1967) |
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| herbert whitton sumsion Peerage person ID=542356 |
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| ken sumsion American politician, US |
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| peter whitton sumsion Peerage person ID=542357 |
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| jennifer sumsion Australian early childhood academic |
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| isabella sumsion candidate in the 2021 Scottish Parliament election |
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| kyle sumsion American rugby union player, US (b. 1993) |
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