According to his Facebook page, which has since been taken down, Bissonnette is from a Quebec City suburb and studied anthropology and political science at Laval University.
The school is less than 3 kilometres from the mosque.
Six men died during Sunday evening prayers at the Islamic cultural centre of Quebec.
Five people remain in hospital.
Two will require surgery while the other three may soon be released.
Thirteen have already been discharged from hospital.
Meanwhile, the prime minister offered condolences to all Muslims in Canada in a statement in the Commons.
(Adrian Wyld / Canadian Press)
Justin Trudeau urged all Canadians to stand together.
”Make no mistake, this was a terrorist attack. It was an attack on our most intrinsic and cherished values as Canadians; values of openness, diversity and freedom of religion. Our hearts go out to the families of the victims.”
The prime minister added Canadians will not be intimidated and will not meet violence with more violence, saying instead we will meet fear and hatred with love and compassion.
Condolences have been offered from politicians around the world, including U.S. President Donald Trump and also here at home, including the premier, who visited a local mosque and mayor of Toronto, who will attend evening prayers.