According to the king lists , he was counted the 70th and last king of the Picts in later times .
Kenneth 's son Constantine died in 876 , probably killed fighting against a Viking army which had come north from Northumbria in 874 .
According to the king lists , Constantine was counted the 70th and last king of the Picts in later times .
Kenneth 's son Constantine died in 876 , probably killed fighting against a Viking army which had come north from Northumbria in 874 .