In the degree “Maitre Irlandais” (‘Irish Master’), XC is an abbreviation for a word that means ‘peace of mind’. Interestingly, this word “Xainchen” appears to be a Chinese word, some of which use as prove for very early Chinese influences on the authors of degrees.
In the Francken Manuscript the letters are X and J and they mean “Xinxee” (“the seat or quiet of the soul”) and “Jackinai”.
collection (1844) of Georg Kloss (1787-1854) (Elu des Neuf. – Elu des Quinze. – Maître Irlandais. – Chevalier Prussien, grade Anglais. – Chevalier d’Orient. Avec 45 tableaux Kl.MS:XXXVI.5)