Cognomen Dagley (Dagley 
) , in the world, is quite a rare family name. The cognomen Dagley is habitual in Canada, where it is a rare surname, the United Kingdom, and the United States. Very seldom, Dagley is the forename as well as the last name.
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| Dagley | United Kingdom, Philippines, Australia, United States, Canada |
| richard dagley British artist (b. 1765) |
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| elizabeth frances dagley British author (b. 1788) |
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| stanley dagley (b. 1916) |
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| arthur dagley (b. 1919) |
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| norman dagley English player of English billiards, GB (b. 1929) |
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| mark dagley (b. 1957) |
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| chris dagley British drummer (1971-2010), GB (b. 1971) |
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| john francis dagley Peerage person ID=369486 |
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| laura dagley researcher |
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| michael j dagley researcher |
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| mabel florence dagley (died 1967) |
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