Definition from Wiktionary, the free dictionary
Proper noun 
- A surname, from Irish Ó Donndubháin "descendant of (a person named) brown + black".
- A male given name, transferred from the surname.
- The Scottish singer-songwriter Donovan
Derived terms 
- Patrick Hanks and Flavia Hodges: A Concise Dictionary of First Names. Oxford University Press 2001