Markus 3:17

3:17 to James and his brother John, the sons of Zebedee, ¹  he gave the name Boanerges (that is, “sons of thunder”);

Markus 13:3

Signs of the End of the Age

13:3 So ²  while he was sitting on the Mount of Olives opposite the temple, Peter, James, John, ³  and Andrew asked him privately,

[3:17]  ¹ tn Grk “to James, the son of Zebedee, and John, the brother of James.”

[13:3]  ² tn Here καί (kai) has been translated as “so” to indicate the implied result of previous action(s) in the narrative.

[13:3]  ³ tn Grk “and James and John,” but καί (kai) has not been translated since English normally uses a coordinating conjunction only between the last two elements in a series of three or more.