Where does “Xmun” come from?

Xmun (Maltese) comes from Sicilian Simuni, from Latin Simon, from Ancient Greek Σίμων, from Hebrew שִׁמְעוֹן — Simon; hearkening, listening.

Ancestry of “Xmun”, step by step

Step	Language	Word	Meaning
1	Sicilian	Simuni	—
2	Latin	Simon	—
3	Ancient Greek	Σίμων	Simon or Simo, a common Ancient Greek name held by one of the Telchines and often used as a Greek counterpart to the Hebrew שמעון (cf. Σῠμεών)
4	Hebrew	שִׁמְעוֹן	Simon; hearkening, listening