Heritier Lumumba (born 15 November 1986) (formerly known as Harry O'Brien) is a Brazilian-born Australian former professional Australian rules footballer who played for the Collingwood Football Club and Melbourne Football Club in the Australian Football League (AFL).
Since his debut in 2005, he achieved All-Australian honours and won an AFL premiership, playing mostly as a half back.
He is the first Brazilian-born player who played an AFL match.