Complex sentence: "Shylock" is not a Jewish name, nor was it known before Shakespeare's play, however scholars believe it probably derives from the biblical name Shalah, which is' Shelach' (שלח) in Hebrew.
Split into simpler sentences: Shylock is not a Jewish name, nor are uses of it before Shakespeare's play known. However, scholars believe it probably derives from the biblical name Shalah, which is' Shelach' (שלח) in Hebrew.