There are two views about the origin of the word, ‘ZO’. The first and most acceptable view is that Zo is a person whose descendants are called Zo-fate or Zo-suante. Some scholars like Pu Thawng Khaw Hau and Pu Captain K. A. Khup Za Thang presented the genealogical table of various Zomi clans in which they strongly claim that they are the descendants of Zo. Zo Khang Simna Laibu and Zo Suan Khang Simna Laibu (Genealogy of the Zo Race of Burma) cover extensively the genealogy of Zo people in Chin State as well as those living in Mizoram and Manipur. Dr. Vum Kho Hau and Dr. Vum Son trace all the Zomi lineal to Zo. Pu Dr. V. Lunghnema wrote the Genealogy of the Hmar tribes, a branch of the Zo family, and he identified Zo as the ancestor of the Hmar clan . This interpretation of the term ‘ZO’ is substantiated by the fact that Zomi have a tradition of naming their clans after the head of each clan, thereby, Hualngo, Zahao, Guite, Singsit, Sailo, etc clans carry each of their fore-father’s name. Likewise, it is logically true with Zo, Dzo or a very similar sounding one for the name of Zo as the founder of Zo people or Zomi. So, the word Zo is a generic name and Zomi is derived from the name of the ancestor with reference to his descendants.
The second view suggests that the term Zo might have been derived from the Zo King of the Zhou Dynasty (B.C. 1027-225) of China. The main argument in this regard is that in ancient times the names of the ruling dynasty became the identity for the subjects .
Whatever differences of opinion there may be, regarding the origin of Zomi, there is ample historical evidence to support that they are Zomi from time immemorial, and lived together under the umbrella of one cultural unity of ancient Zo.