I would guess Mr.Donnelly is Declan Donnelly, part of the duo Ant & Dec. They are TV presenters. Cuurently present Britain's Got Talent, Im a Celeb, Saturday night takeaway.
Without more context, it is not possible to determine who exactly Mr. Donnelly is. It could refer to any person with the last name Donnelly who is commonly known or relevant depending on the context.
William D. O'Connon has written: 'Mr. Donnelly's reviewers...'
He cares about him
Frank. Ms. Donnelly said it on page 159.
Malcolm Donnelly's birth name is Malcolm Douglas Donnelly.
Brendan Donnelly's birth name is Brendan Kevin Donnelly.
Dennis Donnelly's birth name is Dennis Michael Donnelly.
Donnelly Rhodes's birth name is Donnelly Rhodes Henry.
donnelly means to be king
Edward P. Donnelly has written: 'The history of the Coryell and Donnelly families'
Nicholas Donnelly died in 1920.
Donnelly Rhodes is 5' 10".
Antoinette Donnelly died in 1964.