Fred Seibert only has a career as a rock record producer.
John Sigismund may refer to  :. John Sigismund , Elector of Brandenburg -LRB- 1572 -- 1619 -RRB-. John Sigismund Tanner -LRB- 1705 -- 1775 -RRB- , chief engraver at the Royal Mint of Great Britain. John Sigismund Tanner. John Sigismund Tanner. John Sigismund Vasa -LRB- 1652 -RRB- , Polish prince who died shortly after birth. John Sigismund Vasa. John Sigismund Vasa. John Sigismund Zapolya -LRB- 1540 -- 1571 -RRB- , King of Hungary and Prince of Transylvania. John Sigismund Zapolya. John Sigismund Zapolya. Johnann Sigismund may refer to  :. Johann Sigismund Elsholtz -LRB- 1623 -- 1688 -RRB- , German naturalist. Johann Sigismund Elsholtz. Johann Sigismund Elsholtz. Johann Sigismund Kusser -LRB- 1660 -- 1727 -RRB- , German-born composer. Johann Sigismund Kusser. Johann Sigismund Kusser. Johann Sigismund Riesch -LRB- 1750 -- 1821 -RRB- , Austrian military officer. Johann Sigismund Riesch. Johann Sigismund Riesch. Johann Sigismund Scholze -LRB- 1705 -- 1750 -RRB- , Silesian music anthologist and poet. Johann Sigismund Scholze. Johann Sigismund Scholze