'Generations' in the Bible

And his brothers (relatives) by their families, in the genealogy of their generations, were the chief Jeiel, and Zechariah,

The sons of Tola: Uzzi, Rephaiah, Jeriel, Jahmai, Ibsam, and Samuel, heads of their fathers’ households. The sons of Tola were courageous men in their generations; their number in the days of David was 22,600.

With them by their generations according to their fathers’ households were 36,000 troops of the army for war, for they had many wives and children.

They were registered by their genealogies according to their generations, as heads of their fathers’ households, courageous men, 20,200 in number.

These [men] were heads of the fathers’ households, according to their generations, chief men who lived in Jerusalem.

and their relatives according to their generations, 956. All these men were heads of fathers’ households according to their fathers’ houses.

These were heads of fathers’ households of the Levites according to their generations, chief men, who lived in Jerusalem.

Be mindful of His covenant forever,The promise which He commanded and established to a thousand generations,

Of the Hebronites: Jerijah was the chief (these Hebronites were examined according to their descendants and fathers’ households in the fortieth [and final] year of David’s reign, and men of courage and ability were found among them at Jazer in Gilead)