ID this portrait?

[Lady Kathleen of Olmsted]

Though this be a portrait of Lettice Knollys, I just love this gown for all its rich detailing. A gown I want to make for myself some day, or for someone else.

[DonaCatalina]

DC, is that a period image?  There's something about it that looks like a later interpretation...

It was retouched in the 17th century. The only thing I remember was revealed by x-ray was that the ermine was added and some of the jewels.

[DonaCatalina]

This is a lovely gown that I am sure Dona Catalina will make or already has made.

I have been engineering this on the drawing board for years, but I haven't made it yet.
There are particular details of this portrait that lead many art historians to suspect that it is a product of Bronzino's workshop. The hands and face possibly were done by the master himself, which is common in many copies done by his apprentices. The facial resemblance to Eleanor de Toledo has also lead to some speculation of a family relationship.