Ynysddu
... that the Welsh village name Ynysddu means "black island", although the village is not located on an island?
... that the <a href="./Wales" id="mwGfc" rel="mw:WikiLink" title="Wales">Welsh</a> village name <b id="mwGfg"><a class="mw-redirect" href="./Ynysddu,_Caerphilly" id="mwGfk" rel="mw:WikiLink" title="Ynysddu, Caerphilly">Ynysddu</a></b> means "black island", although the village is not located on an island?