Donovan m
Irish and English: from the Irish surname, Gaelic Ó Donndubháin ‘descendant of Donndubhán’, a personal name composed of the elements donn brown + dubh black, dark, with the addition of the diminutive suffix -án. Its use as a given name dates from the early 1900s. The folk-rock singer Donovan may have had some influence on its increase in popularity in the 1960s. It is now also used by people with no Irish connections.
First names dictionary. 2012.