{Zachariah son of Barachiah} (Zachariou huiou Barachiou).
Broadus gives well the various alternatives in understanding and
explaining the presence of "son of Barachiah" here which is not
in  Lu 11:51 . The usual explanation is that the reference is to
Zachariah the son of Jehoiada the priest who was slain in the
court of the temple ( 2Ch 24:20ff. ). How the words, "son of
Barachiah," got into Matthew we do not know. A half-dozen
possibilities can be suggested. In the case of Abel a reckoning
for the shedding of his blood was foretold ( Ge 4:10 ) and the
same thing was true of the slaying of Zachariah ( 2Ch 24:22 ).