Applying the same cognate replacement (using Wiktionary as an etymology dictionary) to the full snippet above, I end up with What. We gar-danes' in yore days

Applying the same cognate replacement (using Wiktionary as an etymology dictionary) to the full snippet above, I end up with What. We gar-danes' in yore days thede kings', thrym frained, how the athelings ellen framed. Often Shield Sheafing scathers' threats many maidens, mead-seats' off-towed eysed Eorlas. Since erst was few-shaft found, he that frother bode, waxed under welkin, worth-minds theed, othat him each there umsittings' over whale-road hear should change yielded, that was good king.