Where does “φασόλιν” come from?

φασόλιν (Byzantine Greek) comes from Koine Greek φασίολος, from Latin phaseolus, from Latin phaselus, from Ancient Greek φάσηλος — cowpea.

Ancestry of “φασόλιν”, step by step

Step	Language	Word	Meaning
1	Koine Greek	φασίολος	—
2	Latin	phaseolus	A type of bean with an edible pod; in Antiquity:...
3	Latin	phaselus	a kind of bean with an edible pod, French bean,...
4	Ancient Greek	φάσηλος	cowpea