1 Chronicles 23:11

Jahath was the first and Ziza the second, but Jeush and Beriah did not have many sons so they were counted as one family with one assignment.

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, Ziza, Jeush and Beriah. These were the sons of Shimei, four in all.

General references

Numbers 3:18
Libni and Shimei were the sons of Gershon. Their families were named after them.