[4] niðr Rǫgnvalds ‘descendant of Rǫgnvaldr [= Þorfinnr]’: This Rǫgnvaldr is Þorfinnr’s ancestor, Rǫgnvaldr inn ríki Eysteinsson, jarl of Møre (Mœrr) in Norway, traditionally the first Nordic possessor of Orkney and Shetland (e.g. HhárfHkr ch. 22, ÍF 26, 122).