Namesakes
Olympic Medalists:
1 bronze, 1 bronze/silver, 1 silver
(bronze) Carlos Domingos Massoni 1960; 1964 basketball 
(silver) Domingos Maracanã 1984 volleyball
(bronze/silver) André da Silva (a.k.a. Domingos) 1996; 2000 4x100 m relay
Portuguese Presidents and Prime Ministers:
2 prime ministers
(prime minister) Domingos Pereira 1919; 1920; 1925
(prime minister) Domingos Oliveira 1930-1932
Saints:
1 blessed
Blessed Domingos Jorge ?-1619