I am not sure who this saint is.
But as I look at his face, his hands, his overall appearance, it seems to me the artist wanted to convey the impression of someone thoughtful, introspective, considering, wise. He is of mature years. In our age when youth is held up and pursued vigorously as the ideal, it is beautiful to see the traces of time honored on such a face. Here is someone I would like to sit down and talk with about the state of the world today.
Why is he carrying a double-handled sword? I cannot find in my library any indication of which saint might have this attribute. Can it be an allusion to Hebrews 4:12?
Indeed the word of God is living and effective, sharper than any two-edged sword, penetrating even between soul and spirit, joints and marrow, and able to discern reflections and thoughts of the heart.