Family name Alfonsus (Alfonsus 
) , all around the world, is a rare last name. The surname Alfonsus is characteristic of Indonesia, where it is a rare surname, Greece, where it is a very rare surname, and Malaysia. Measured by absolute frequency, it is commonest in Indonesia, Nigeria, and Malaysia. More prevalently, Alfonsus is the forename as well as the last name.
Adi, Aditya, Adrian, Kusuma, Wilson, Wibowo, Michael, Antalik, Raditya, Rahmadi, Ligouri, Liquori, Thyonada, Nugroho, Simbolon, Setyanta, Hasnianka, Wardhana, Kurniawan, Kristanto, Purwandoko, Situmorang, Andika, Satria, Wahyu, Lirus, Aji, Boy, Dwi, Seto, Alex, Bayu, Riky, Ryan, Didi, Levi, Octavianus, Jaya, Mario, Alfin, Anjar, Kevin, Putra, Rocha, David, Davzz, Damar, Dhani, Maria, and Wahyu Adi Nugroho