Laran chief, Ngaw Wa:n Luhung, together with some siblings, including Pay Wa:n Luhung (Pay Luhung "Aya'," see 5-1), and the Long Glat chief, Lejiw Do:m Ba:ng Lawing, and his son, Ding "Tung" (Table 4).
Referring to the genealogy of the Ga'ay Long Ba'un (Table 9), Ngaw Wa:n Luhung seems to belong to the same generation as Ping Wa:n Ding Wa:n Luhung, great-granddaughter of the first chief Bit Ivung, because Ping's son, Jiw Luhung, is said to have married Ngaw's daughter, Luhung Ngaw.
At that time, the Kayanic peoples of Apo Kayan were divided into two alliance groups, one under Ding Lejiw and the other his rival, Ngaw Wa:n Luhung ("Ngo Wan Luhong").
In fact, the Uma:' Laran under his rival, Ngaw Wa:n Luhung, were also mixed with the Ga'ay Long Ba'un.
At the time, the Apo Kayan region was divided between two paramount chiefs, Ngaw Wa:n (Ngaw Wa:n Luhung above, Uma:' Laran) in Long Kejanan, and Lejiw "Aya'" (Lejiw Do:m Ba:ng Lawing in Table 4) and his son Ding "Tung" at the headwaters of the Jemahang and Danum rivers (see Map l).
After the death of Kuleh, his brother, Lejiw "Aya'," in Long Jemahang declared he would seek revenge against Ngaw Wa:n.
Hearing about the war against Ngaw Wa:n, Bilung offered to help Lejiw with his Kenyah forces.
The allied forces of Lejiw "Aya'" and the Kenyah finally defeated Ngaw Wa:n.