From artuk.org; removed spots at and near the edges with Photoshop.
This appears to be based on the Bronzino portrait seen in the last image. Something was lost in translation.
Keywords: Bronzino, straight coiffure, jeweled hair net, earrings, lace partlet, high neckline, bodice, square neckline, coat, collar, buttons, long full sleeves, cuffs, close skirt