Feriz Beg
... that the first mention of the name Sarajevo was in a 1507 letter written by Feriz Beg?
... that the first mention of the name <a href="./Sarajevo" id="mwAx4" rel="mw:WikiLink" title="Sarajevo">Sarajevo</a> was in a 1507 letter written by <b id="mwAx8"><a class="mw-redirect" href="./Feriz_Beg" id="mwAyA" rel="mw:WikiLink" title="Feriz Beg">Feriz Beg</a></b>?