Where does “إشعياء” come from?

إشعياء (Arabic) comes from Biblical Hebrew יְשַׁעְיָהוּ.

Ancestry of “إشعياء”, step by step

Step	Language	Word	Meaning
1	Biblical Hebrew	יְשַׁעְיָהוּ	—

إشعياء — Etymology, Origin & Word History | Etymology Explorer