MINNEAPOLIS: His name is chanted by demonstrators around the globe. His face is displayed on murals all over the United States. Since his brutal death George Floyd has embodied, more than any other, the Black victims of police violence and racism in the United States.

"Daddy changed the world." The words of Floyd's six-year-old daughter Gianna summed up the paradox of his killing, in which the end of his life began a moral reckoning on race and white supremacy far beyond the borders of the United States.

The 46-year-old died of asphyxiation beneath the knee of a white police officer, Derek Chauvin, on May 25, 2020 in the US city of Minneapolis.

Chauvin's trial opens Monday.

The horrifying killing, which kicked off the biggest civil rights protests in the US since the 1960s, snuffed out a life marked by hardship but also generosity.

Standing at six foot four inches (1.93 meters), Floyd was known to friends and family as a "gentle giant," a rapper and athlete who suffered runs-in with the law and addiction but who wanted the best for his children.

His mother, for whom he cried out when he was dying, moved to Houston shortly after he was born in 1973 in North Carolina.

He grew up in the Third Ward, a poor and predominantly African American neighborhood in central Houston.

"We didn't have a whole lot, but we always had each other," his cousin Shareeduh Tate said during a memorial gathering last year in Minneapolis.

At Jake Yates High School, he played the role of big brother to a lot of the local boys.

"He was teaching us how to be a man because he was in the world already before us," said his younger brother Philonise at the memorial.

Floyd stood out on the football field and excelled at basketball, playing the latter sport when he went to college.

"He was a monster on the court," said Philonese. "But in life, in general, talking to people, a gentle giant."