Υπάρχει (διανοητική) ασθένεια κρετινισμός από το γαλλικό cretinisme...Στα ελληνικά αντιδάνειο είναι και η προέλευση είναι από το χριστιανός όπως είπε ο Άγγελος...
Edit : να τι λέει και η wikipedia...
The etymology of the word cretin is not known with certainty. Several hypotheses have been proposed. The most common derivation provided in English dictionaries is from the Alpine French dialect pronunciation of the word Chretien - (a) Christian, which functioned as a form of greeting in those parts. According to the Oxford English Dictionary, the translation of the Latin term into 'human creature' implies that the label 'Christian' is a reminder of the humanity of the afflicted, in contrast to brute beasts [1]. Other sources have suggested 'Christian' refers to the 'Christ-like' inability of such a person to commit sin, because of an incapacity to distinguish right from wrong [2].
Other speculative etymologies have been offered:
From creta, Latin for chalk, because of the pallor of those affected.
From cretira, Grisson-Romance creature, from Latin creatus.
From cretine, French for alluvium (soil deposited by flowing water), an allusion to the suspected origin from inadequate soil