Later evidence of Connall mac Taidg's life is provided by
regnal lists and by Irish historical writings. The earliest of these may have been compiled during the ninth century not long after his reign, but none survives a manuscript of that date. A list of synchronisms – a series of known, dateable events used to align Irish lists of kings to Scottish ones – was attributed to Irish writer
Flann Mainistrech in the eleventh century and provides another list of kings. Two manuscripts of Flann's work state that there were "sixteen kings in Scotland" between the death of
Áed Allán (d. 743) and the death of
Áed Findliath (d. 789). The sixteen begin with
Dúngal mac Selbaig and end with
Kenneth MacAlpin. Two kings named Conall, "Conall Coem, and another Conall, his brother", are said to have reigned between
Domnall mac Caustantín in the early ninth century, and his father,
Caustantín mac Fergusa, the man who had defeated Conall in 789. The
Duan Albanach, dated on internal evidence to rather later in the eleventh century, follows this by having Domnall mac Caustantín followed by two Conalls and then Caustantín. It is generally assumed that the
Duan and Flann aim to report the succession of kings in
Dál Riata. Conall is not included in any surviving genealogical material, but this is typical for the period. The
Poppleton Manuscript's Pictish king list includes a king named Canaul son of Tarla'ason of Tang in some versions but simply omitted from others. This Canaul has generally been identified with Conall. The lists assign a reign of five years to this king who precedes Caustantín mac Fergusa. == King of Picts or Dál Riata? ==