Last name Blackadder (Blackadder 
) , around the world, is a rare surname. The family name Blackadder is characteristic of Australia, where it is a rare surname, the United Kingdom, and New Zealand. Not in comparison with a country's population, it is commonest in the United Kingdom, Australia, and Canada. Very seldom, Blackadder is the forename as well as the last name.
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| Blackadder | United Kingdom, Canada, Australia, New Zealand, United States |
| robert blackadder Roman Catholic archbishop (b. 1445) |
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john blackadder Presbyterian minister, GB (b. 1622) |
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john blackadder Scottish soldier, GB (b. 1664) |
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| william blackadder Scottish physician and plotter (b. 1647) |
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| adam blackadder Scottish merchant and writer on covenanting (b. 1659) |
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| blackadder Scottish surgeon and meteorologist, GB (b. 1750) |
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agnes forbes blackadder Scottish medical doctor (1875-1964), GB (b. 1875) |
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| john william blackadder (1868-1929) (b. 1868) |
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| edward blackadder Canadian politician (1874-1922), CA (b. 1874) |
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dame elizabeth blackadder Scottish artist, GB (b. 1931) |
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| bill blackadder English footballer (1899-1977), GB (b. 1899) |
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| rosemary blackadder (1901-1975) (b. 1901) |
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| william blackadder rugby player (b. 1913) |
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todd blackadder New Zealand rugby union footballer and coach, NZ (b. 1971) |
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| jesse blackadder Australian writer, AU (b. 1964) |
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