"His father was a firefighter who founded the nonprofit organization the Percy R. Johnson Burn Foundation, named after his partner Percy R. Johnson, the city's first African-American fire instructor and captain, who died in the line of duty.[11] Johnson's father was also critically burned and disabled in the line of duty during the same fire.[12]"
"Johnson's maternal grandfather, Nunzio Messina, was from Italy, and he has some French and Irish ancestry on his father's side of the family.[14]"
the guy's got some interesting stuff in his Wikipedia Bio.