The Collaborative International Dictionary of English v.0.48:

Undoubted \Un*doubt"ed\, a.
   Not doubted; not called in question; indubitable;
   indisputable; as, undoubted proof; undoubted hero. --
   Un*doubt"ed*ly, adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Undoubted \Undoubted\
   See doubted.