Hello all....

Sorry, if I give my voice here, even if I am no expert of the Wittelsbachs, but for my part I think that this is Auguste Amelie, queen of Saxony. All the dates of the others do not fit. I have seen it several times identified as the queen of Saxony, when still young. It´s true that Winterhalter is rather an official painter of the Second Empire, but this can be one of his earlier paintings, I am quite sure. He was born in 1805 and died in 1873, whereas Amelie , Princess of Bavaria was born in 1801 and lived until 1877. They are contemporaneans. So this portrait can have been made also before the Second Empire, by a younger Franz Winterhalter. Furthermore Joseph Stieler and Franz Winterhalter knew each other and also worked together for some time, as I have read.
If I compare this...

with this...

It is not so impossible that it is/ or can be the same person, even when the hair is a bit different, and even when I know that especially the older Amelie on photosgraphs seemed different.
The type of face and especially the nose of the woman on the Winterhalter Portraits bears a resemblence to Amelies mother Caroline of Baden (please look...so in my view)

The mentioned Amalia Pilhar does not fit in the formation at all in my view:

She is dark and the whole type is different.
Concerning the wife of Pius, who was also mentioned, I don´t know it, but concerning the life dates, I think it´s rather not her. She lived from 1789 until 1827, which means that Winterhalter must have painted her too young (Winterhalter was to young) as he was born in 1805, and Amelie of Arenberg died with 38, and looks like a twenty year old on the picture, which means that Winterhalter was still a child then

Maybe others do not share my opinion, but for me this is the most logical possibility. It should always bee considered that these are all only painting and every painter makes the people a bit different - as he sees them.