There are apochraphal writings that say Isaiah was :
Isaiah's Legacy in the Later Literature : Saint and Martyr
Looking back from the Hellenistic period, Ben Sira sang a song in praise of famous men and praised Isaiah as "the great prophet whose vision could be trusted" (Ecclus. 48:22). In due course, this revered prophet became the model of a saintly life. According to rabbinic and pseudepigraphical traditions, Isaiah died the death of a monotheist martyr, hacked to death during the reign of the ruthless paganizing King Manasseh (see B. Yevamot 49b and The Ascension of lsaiah 5: 11‑14).