sacrificial boar
... that Norsemen made vows at Yule on the bristles of a sacrificial boar?
... that <a href="./Norsemen" id="mwBJ0" rel="mw:WikiLink" title="Norsemen">Norsemen</a> made vows at <a href="./Yule" id="mwBJ4" rel="mw:WikiLink" title="Yule">Yule</a> on the bristles of a <b id="mwBJ8"><a href="./Sonargöltr" id="mwBKA" rel="mw:WikiLink" title="Sonargöltr">sacrificial boar</a></b>?