Nelson Mandela's oldest grandson, Mandla Mandela, has been sentenced to two years in prison or pay a fine of $817 for assaulting a school teacher in 2013.
Mandla, who is a legislator for the ruling African National Congress (ANC), was found to have attacked a teacher, Mlamli Ngudle, in a 2013 road rage incident in Mthatha, Cape Province, South Africa.
The prosecutor said Ngudle had allegedly bumped a parked vehicle belonging to one of Mandla's friends.
Some witnesses said Mandla threatened Ngudle with a gun.
The prosecutor said even the court in Mthatha during the trial confirmed that the legislator was arrogant and evasive during his testimony.
He said the legislator had been found guilty of assault in March.
Mthatha made headlines in 2013 when a judge ordered him to return the remains of his father and two other children of Nelson Mandela to Qunu, their ancestral home.
He had moved them to a memorial centre in another location without consulting the family.