Cognomen Dillane (Dillane 
) , in all the world, is a rare family name. The last name Dillane is habitual in Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. In absolute terms, it is the most numerous in Ireland, the United States, and the United Kingdom. Also, Dillane is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dillane | United Kingdom, Canada, United States, Democratic Republic of the Congo, Ireland |
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stephen dillane British actor, GB (b. 1957) |
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frank dillane British actor, GB (b. 1991) |
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| richard dillane British actor, GB (b. 1964) |
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| patrick dillane researcher (ORCID 0000-0001-5377-5035) |
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| john dillane Peerage person ID=716889 |
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| derek dillane researcher |
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| ultan dillane French-born Irish rugby union player, IE (b. 1993) |
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