And it was told him by some who said, Your mother and your brothers stand outside, desiring to see you.
All Commentaries on Luke 8:20 Go To Luke 8
George Leo Haydock
AD 1849
These brethren were not the sons of the blessed Virgin Mary, mother of God, as Helvidius wickedly taught; nor yet the sons of Joseph, by another wife; for, as St. Jerome writeth, not only Mary, but Joseph also, observed virginity. (Contra Helvidium, chap. ix. et ibidem, chap. viii.)
In the scriptural idiom, cousins are called brethren. (Bristow)