Đèo Văn Trị also known as his Lao name Cam Oum, was the White Tai leader at Muang Lay in the Sip Song Chau Tai or Federation of the Twelve Tai states, of the Tai Dam people.

White Tai is an ethnic group of Laos, Vietnam and China. In Vietnam they are called Tai Dón or Thái Trắng and are included in the group of the Tái peoples, together with the Thái Đen, Thái Đỏ, Phu Tha