From Wiktionary, the free dictionary
From cirulgia, cirurgia (“surgery”) + -ano.
cirurgiano m (plural cirurgianos)
- surgeon
c. 1250, Alfonso X, Lapidario, f. 23v:Et los fiſicos ⁊ los cirurgianos huſan della en los q̃ q̃eren fender o taiar por que non ſientã la dolor.- And physicians and surgeons make use of it on those who they want to cut or slash, so they will not feel the pain.