Note 1 at Mt 20:20: Matthew presented James and John's mother as the actual petitioner, whereas Mark showed James and John asking the question (Mr 10:35). There is no contradiction here, for the three joined in making the petition, and all were certainly, to some extent, responsible (this verse and Mt 20:22).

Note 2 at Mt 20:20: By comparing this verse with Mt 27:56 and Mr 15:40, it can be derived that James and John's mother was named Salome. She is only mentioned by name in Scripture in Mr 15:40 and 16:1.