1 Chronicles 23:11

Jahath was the first and Zizah the second; but Jeush and Beriah did not have many sons [not enough for a father’s house or clan], so they were [counted together] as one father’s household, one working group.

Treasury of Scripture Knowledge

Summary

And Jahath was the chief, and Zizah the second: but Jeush and Beriah had not many sons; therefore they were in one reckoning, according to their father's house.

General references

Bible References

Zizah

1 Chronicles 23:10
The sons of Shimei: Jahath, Zina (Zizah), Jeush, and Beriah. These were the four sons of Shimei.

General references

Numbers 3:18
These are the names of the [two] sons of Gershon by their families: Libni and Shimei;