Last name Seagrave (Seagrave 
) , all around the world, is quite a rare family name. The cognomen Seagrave is habitual in Ireland, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and New Zealand. In absolute terms, it is commonest in the United Kingdom, the United States, and Ireland.
| VARIANT | COUNTRY |
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| Seagrave | United Kingdom, Ireland, Canada, Australia, United States |
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stephen seagrave English justice and administrator, GB (b. 1171) |
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| nicholas seagrave English noble (b. 1201) |
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| nicholas seagrave English peer (b. 1201) |
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| stephen seagrave (1250-1325) (b. 1250) |
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| stephen seagrave Archbishop of Armagh (b. 1250) |
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| gilbert seagrave English theologian, FR (b. 1250) |
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| gilbert de seagrave English administrator and justice (b. 1250) |
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| john seagrave English peer and landowner, GB (b. 1315) |
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| elizabeth seagrave (1338-1368) (b. 1338) |
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| hugh seagrave (b. 1350) |
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| robert seagrave English cleric (b. 1693) |
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charles edwin seagrave politician in Massachusetts, US (b. 1825), US (b. 1825) |
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c. burnside seagrave politician in Massachusetts, US, US (b. 1862) |
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mabel seagrave American physician, US (b. 1882) |
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| gordon seagrave physician (b. 1897) |
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