Three ancestral religious kings 三大護法國王（松贊岡波、赤松德贊、赤惹巴千）
The three ancestral religious kings (Wyl. mes dbon rnam gsum; Tib. mé wön nam sum) — the most famous of Tibet's ancient kings, who made the greatest contribution to establishing the teachings of the Buddha in Tibet.
They are said to have been emanations of the Lords of the Three Families.