Welsh names
... that the English names for the towns of Brecon and Cardigan derive from the names of Welsh mediaeval kingdoms, but the Welsh names for those same places refer to local rivers?
... that the <a href="./English_language" id="mwFdo" rel="mw:WikiLink" title="English language">English</a> names for the towns of <a href="./Brecon" id="mwFds" rel="mw:WikiLink" title="Brecon">Brecon</a> <i id="mwFdw">(pictured)</i> and <a href="./Cardigan,_Ceredigion" id="mwFd0" rel="mw:WikiLink" title="Cardigan, Ceredigion">Cardigan</a> derive from the names of <a href="./Wales" id="mwFd4" rel="mw:WikiLink" title="Wales">Welsh</a> <a class="mw-redirect" href="./Mediaeval" id="mwFd8" rel="mw:WikiLink" title="Mediaeval">mediaeval</a> kingdoms, but the <b id="mwFeA"><a class="mw-redirect" href="./Welsh_placenames" id="mwFeE" rel="mw:WikiLink" title="Welsh placenames">Welsh names</a></b> for those same places refer to local rivers?