Charles Ellicott Commentary Mark 14:61

"But he held his peace, and answered nothing. Again the high priest asked him, and saith unto him, Art thou the Christ, the Son of the Blessed?" — Mark 14:61 (ASV)

The Son of the Blessed.—In St. Matthew and St. Luke we have simply “the Son of God;” but the use of “the Blessed” as a name of God in doxologies and other solemn formulas was a common practice.