Dungkar Rinpoche's dictionary, pp. 418-419. He was made abbot of Tshogs chos lung pa in 1294. Later he also became abbot of Zhwa lu.
I wonder if he is identical to the Dge slong Lung righs 'dzin pa Grags pa gzhon nu who is author of works on Spyod 'jug in Kadam Sungbum, vols. 66, 67.
