Donnell \d(o)-nne-ll\ as a boy's name (also used as girl's name Donnell), is pronounced DAHN-el, don-NEL. It is of Scottish and Irish origin, and the meaning of Donnell is "world mighty; brown-haired fighter". Also used as a variant of Donald.
Donnell has 4 variant forms: Donal, Donell, Donnel and Donnelly.
For more information, see also the related name Donald.