Linda, when you looked them up in the database, did you scroll down a bit to view all the pictures for that cultivar? Sometimes that can give you a better overall view of the flower, as well as the leaves and the plant habit, branching on the flower stem, etc.
Looking at Alcazar, just my opinion but I think it has much more striping on the falls than the one in your picture. So my guess would be that it is Lent A.Williamson. The stripey area is shorter on it.
They are VERY similar though.
