While it is not totally unheard of having a parent/child have different political affiliations (e.g. Jack Layton and his father, PC MP Robert Layton), I found this one surprising.
His father, Ed Brown, ran for the NDP in Davenport in 1979 and 1980.
Patrick Brown's father was a federal NDP candidate
Sun, 2015-05-10 22:46
#1
Patrick Brown's father was a federal NDP candidate
Sun, 2015-05-10 22:51
#2
Another interesting fact, his maternal uncle is former Harris-era PC MPP Joe Tascona.