This hat style may have a name but I don't know it, the nearest equivalent I can see is Grandee or a tall Bolero hat.
Made by Fernández y Roche of Spain according to the label, I found it at a historical fayre TORM (the Original Re-enactors Market) in 2008, cost me £75, it is a quality hat, not a something from a fancy dress stall, used several times, this hat is well loved by me and its going to last a while.