'In Their Generations' in the Bible

These were heads of families in their generations; chief men: these were living in Jerusalem.

These were heads of families of the Levites in their generations, chief men; they were living at Jerusalem.

Of the Hebronites, Jerijah was the chief of all the Hebronites, in their generations by families. In the fortieth year of the rule of David a search was made, and able men were seen among them at Jazer of Gilead.