Þundi rennu randhvéls ‘about the Þundr <= Oðinn> of the rush of the rim-wheel [SHIELD > BATTLE > WARRIOR = Óláfr Tryggvason]’: (a) This kenning can be construed with óði ‘poem’ as in the interpretation above (and in Skj B and Skald). (b) It could alternatively be construed with Rekstefju, thus, ‘I commence Rekstefja about the warrior’. Either case involves the use of the dat. case to mean ‘about’, which is unusual, but cf. lof ‘praise-poem’ with a kenning in the dat. in the second helmingr.