Biologically, His
brothers are 4, James, Joseph, Simon and
Judas.....Matt 1:18, 13:55 ; Mark 3:31, John 2:12, 7:1-10, Acts 1:14, 1Cor 9:4, Gal 1:18.
But Spiritually, Jesus has many brothers (Matt 1:23-25), but from God as the father. God bless us all.