1) Brian Doyle, the Canadian Children's Author
2) Brian Doyle 1943, author of English & Englishness;
3) Doyle, Brian, 1956 Nov. 5-, works at Catholic University of Leuven, author of The apocalypse of Isaiah metaphorically speaking
4)Brian Doyle, 1956 Nov. 6-, editor of Portland Magazine, essayist, novelist. Leaping: Revelations & Epiphanies
#5 Brian J. (Brian John) Doyle, 1955-, Equality and Discrimination: The New Law.
Note: authors 3 and 4 are definitely different people, with birthdays just one day apart.