Charles Ellicott Commentary Mark 15:39

"And when the centurion, who stood by over against him, saw that he so gave up the ghost, he said, Truly this man was the Son of God." — Mark 15:39 (ASV)

See Notes on Matthew 27:54-61.

When the centurion.—St. Mark, after his manner, uses the actual Latin word, St. Matthew the Greek equivalent.