[Ozone34]

Many consider St. John to be a martyr as well. He miraculously survived being boiled in oil and later died “naturally”. The boiling in oil would certainly have resulted in his unequivocal martyrdom without supernatural intervention.

For a Thomistic discussion please refer to:

“Why St. John Was Not Boiled in Oil”
http://www.cts.org.au/2001/universitas10/stjohnnooil.htm

“Perhaps you are thinking as you read the title that I am going to demythologise the tradition that St John the Evangelist was miraculously preserved from death in boiling oil. Not at all. Quite the opposite, in fact. This article presupposes that the miracle did take place and seeks to understand the nature of the miracle that occurred... “

[Salvation]

Thanks for that link.