Complex sentence: The manner of King Roderic's ascent to the throne is unclear; there are accounts of a dispute with Achila II, son of his predecessor Wittiza, and later regnal lists, which cite Achila, omit Roderic, consistent with the contemporary account of civil war.
Split into simpler sentences: The manner of King Roderic's ascent to the throne is unclear; there are accounts of a dispute with Achila II, son of his predecessor Wittiza. Later regnal lists, which cite Achila and omit Roderic, are consistent with the contemporary account of civil war.