I just spotted an article about the “Z-Cox” family of North Carolina:
Ameriah Biggs Cox Jr. and Jutry Hart married in 1870.
Together, they had 11 children and each had a first name beginning with Z.
The girls were Zylphia, Zula, Zadie and Zenobia. The boys went by Zadok, Zeber, Zeronald, Zesely, Zeola, Zora, and Zelbert.
The descendants of Ameriah and Jutry have been gathering for annual family reunions for more than 75 years, and many of these descendants have been given Z-names as well.