Osbeorn
... that, according to the Anglo-Saxon Chronicle, the eldest son of Earl Siward of Northumbria, Osbeorn, died in battle against King Macbeth of Scotland in 1054?
... that, according to the <i id="mwBQE"><a href="./Anglo-Saxon_Chronicle" id="mwBQI" rel="mw:WikiLink" title="Anglo-Saxon Chronicle">Anglo-Saxon Chronicle</a></i>, the eldest son of Earl <a href="./Siward,_Earl_of_Northumbria" id="mwBQM" rel="mw:WikiLink" title="Siward, Earl of Northumbria">Siward of Northumbria</a>, <b id="mwBQQ"><a href="./Osbeorn_Bulax" id="mwBQU" rel="mw:WikiLink" title="Osbeorn Bulax">Osbeorn</a></b>, died in battle against King <a class="mw-redirect" href="./Macbeth_of_Scotland" id="mwBQY" rel="mw:WikiLink" title="Macbeth of Scotland">Macbeth of Scotland</a> in 1054?