6:17 For Herod himself had sent men, arrested John, and bound him in prison on account of Herodias, his brother Philip’s wife, because Herod 1 had married her.
Mark 6:28
6:28 He brought his head on a platter and gave it to the girl, and the girl gave it to her mother.
1 tnGrk “he”; here it is necessary to specify the referent as “Herod,” since the nearest previous antecedent in the translation is Philip.