You didn't give any birth years or place for Brendan or Joseph but I found a fellow that may fit. Can you tell me if his age seems right?
PASSENGER LIST - Arrival date - APRIL 3,1926 - Londonderry, Ireland to Halifax, Nova Scotia Joseph Maguire, age 22, born Omagh, Co. Tyrone single farm labourer destination - Land settlement branch, Toronto, ON contact in Ireland - Father Mr. James Maguire, Mountjoy West, Omagh, Co. Tyrone Ship:Cameronia
I did not find an entry for a Brendan Maguire - could he have gone by another name?
Please let me know if Joseph above is the right fellow.