According to the List of Old Bulgar Rulers Anonymus 30 was of the family of Dulo and ruled for twenty-eight years in succession to Tervel 1 and before Sevar 1; his name is lost; List of Old Bulgar Rulers p. 273 ("...28 years, his race Dulo, and his years dvansh ekhtem"), Runciman, First Bulgarian Empire, p. 277 (for the chronology). He was ruler of the Bulgars from 718/719 to 725; see Grumel, Chronologie, p. 388. See also Runciman, First Bulgarian Empire, pp. 34-35.

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