Siyavuş
Yes, though Persian in origin, it was widely adopted by Bosnian Muslims during the Ottoman period and borne by prominent Islamic statesmen.
Siyavuş Pasha (d. 1602), the Bosnian Ottoman Grand Vizier, is the most notable historical figure bearing this name.
It means 'auspicious' or 'fortunate', derived from Persian elements meaning 'black' (siyah) and 'bird' (kuş/ush), symbolizing a fortunate omen.
It is extremely rare in modern times, considered a historical relic of the Bosnian Ottoman elite.
Yes, it carries strong historical dignity and noble connotations, though parents should be prepared to explain its pronunciation and history.