Beli II (Welsh: Beli ap Elfin; Irish: Bile mac Eilphin; died 722) was a king of Alt Clut, a Brittonic kingdom based on Dumbarton Rock, for some period in the early 8th century.
MacQuarrie, Alan, "The Kings of Strathclyde", in A. Grant & K.Stringer (eds.) Medieval Scotland: Crown, Lordship and Community, Essays Presented to G.W.S. Barrow, (Edinburgh, 1993), pp. 1–19