Family name Deignan (Deignan 
) , all over the world, is quite a rare last name. The cognomen Deignan is habitual in Ireland, where it is quite a rare surname, Togo, and the United States, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in the United States, Ireland, and the United Kingdom.
| VARIANT | COUNTRY |
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| Deignan | Australia, Togo, Ireland, United Kingdom, United States |
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h. g. deignan ornithologist (1906-1968), US (b. 1906) |
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| stella marie aglaé leche deignan American anthropologist, US (b. 1901) |
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| thomas deignan (b. 1897) |
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| simon deignan Gaelic football player and referee, IE (b. 1922) |
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lizzie deignan English track and road racing cyclist, GB (b. 1988) |
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| kathleen deignan American theologian, US (b. 1947) |
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| martina deignan American actress, US |
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| joshua l deignan researcher |
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| stuart deignan Northern Irish election candidate |
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| alice deignan researcher, ORCID id # 0000-0002-9156-9168 |
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| alice helen deignan researcher |
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| daniel j. deignan Ph.D. Indiana University 1974 |
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