Surname Sinnott (Sinnott 
) , across the world, is quite a common last name. The cognomen Sinnott is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom. Not in comparison with a country's population, the name is most common in the United States, Ireland, and the United Kingdom.
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| Sinnott | United Kingdom, Australia, Ireland, United States, Canada |
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allston m. sinnott politician in Massachusetts, US, US (b. 1863) |
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nicholas j. sinnott American politician, US (b. 1870) |
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herbert arthur sinnott Canadian politician, CA (b. 1871) |
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| john sinnott recipient of the Victoria Cross, IE (b. 1829) |
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edmund ware sinnott American botanist (1888-1968), US (b. 1888) |
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lillian sinnott Stage actress (1890-1914), US (b. 1890) |
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| joseph f. sinnott (b. 1837) |
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| edward sinnott politician (b. 1864) |
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joe sinnott artist (1926-2020), US (b. 1926) |
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| arthur alfred sinnott Roman Catholic archbishop (b. 1877) |
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| william sinnott Recipient of the Congressional Gold Medal (1886-1965) (b. 1886) |
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john t. sinnott Physician (b. 1948) |
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kathy sinnott Irish politician and disability rights campaigner, IE (b. 1950) |
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declan sinnott Irish musician and producer, IE (b. 1950) |
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| john sinnott Canadian politician, CA (b. 1905) |
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