Where does “besoiche” come from?

besoiche (Old French) comes from Latin basilica, from Ancient Greek βασιλική, from Ancient Greek βασιλεύς, from Proto-Hellenic gʷatiléus — chief; king.

Ancestry of “besoiche”, step by step

Step	Language	Word	Meaning
1	Latin	basilica	basilica; church; oblong hall with colonnade as a...
2	Ancient Greek	βασιλική	basilica; royal thing; royal
3	Ancient Greek	βασιλεύς	chief, master; king, lord, patron
4	Proto-Hellenic	gʷatiléus	chief; king

Every word from Proto-Hellenic gʷatiléus →Every word from Ancient Greek βασιλεύς →Every word from Ancient Greek βασιλική →