Fr Casimiro de Sousa was a Goan priest who worked in the Goan Church of Batim as the Vicar. The Batim Church is one of the older Goan Churches in Goa. He was a native of Saligao, Goa. He also worked as the Vicar in the Church of Sao Matias, Malar, Goa. The St Matias Church at Malar on the Island of Divar in Goa was built in 1590.