A.T. Robertson Commentary John 15:21

"But all these things will they do unto you for my name`s sake, because they know not him that sent me." — John 15:21 (ASV)

Unto you (εις υμας). Like the dative υμιν (Textus Receptus) as in the papyri and modern Greek (Robertson, Grammar, p. 594).

For my name's sake (δια το ονομα μου). See verse 20. See this same warning and language in Mt 10:22; Mr 13:13; Matthew 24:9; Luke 21:17). There is little difference in meaning from ενεκεν μου (Luke 21:12). Loyalty to the name of Christ will bring persecution as they will soon know (Acts 5:41; 1 Peter 4:14). About the world's ignorance of God see Lu 23:34; Acts 3:17; John 16:3.