Sipho Mbhele, 20, and Patrick Radebe, 23, were sentenced to five life sentences and 24 years in jail each.
Geraldine's mother, Caroline Dryer, said last week that she welcomed the sentences handed down by Magistrate Rieta Willemse.
"I welcome the sentences even though this will not bring my children back," said Dryer. "Patrick Radebe was raised by my family since he was five, and they took him as one of their own."
Mbhele and Radebe, together with Siphiwe David Motaung, broke into the Vianas' house. When Antonio arrived and surprised them, Motaung fled, leaving Mbhele and Radebe behind.
The pair hacked him 12 times on the head with a panga and took his pistol.
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