From Wiktionary, the free dictionary
From Latin sīmius, from sīmia (“ape, monkey”), from sīmus (“flat-nosed”), from Ancient Greek σῑμός (sīmós).
ximio m (plural ximios)
- ape, monkey
c. 1250, Alfonso X, Lapidario, f. 98v:Et que deſcenda ſobreſta piedra la uertud de figura de om̃e que lieua dos uacas. ⁊ un ximio ⁊ un oſſo ante ſi.- And when over this stone descends the virtue of the figure of the man who has two cows, a monkey and a bear before him.