Johanan was the father of Azariah, who served as priest in the temple that Solomon built in Jerusalem,
The priests and Levites were more concerned than any other Israelites to preserve their pedigree clear and to be able to prove it, because all the honours and privileges of their office depended upon their descent. And we read of those who, though perhaps they really were children of the priests, yet, because they could not find the register of their genealogies, nor make out...
Commenting on 1 Chronicles 6:1-30
he it is that executed the priest's office in the temple that Solomon built in Jerusalem--It is doubtful whether the person in favor of whom this testimony is borne be Johanan or Azariah. If the former, he is the same as Jehoiada, who rendered important public services (2Ki.
And Johanan begat Azariah, (he [it is] that executed the priest's office in the temple that Solomon built in Jerusalem:) (b) And valiantly resisted king Uzziah, who would have usurped the priest's office .