Where does “اَلقَنْت” come from?

اَلقَنْت (Arabic) comes from Latin Lucentum, from Ancient Greek λευκός, from Proto-Hellenic *leukós.

Ancestry of “اَلقَنْت”, step by step

Step	Language	Word	Meaning
1	Latin	Lucentum	—
2	Ancient Greek	λευκός	bright, shining, gleaming; light in color; white;...
3	Proto-Hellenic	*leukós	—