1892 Ella or Alix von Hessen-Darmstadt by Hermann von Kaulbach (Schloßmuseum Darmstadt - Darmstadt Germany)
The person depicted has been called Ella and Alexandra by participants in the Alexander Palace Time Machine Discussion Forum. I believe this is a semi-copy of the last image with the dress slightly altered (or the last image is a semi-copy of this one).
From Wikimedia.
The tight hourglass figure of the last image has been replaced by a waist region defined by two bands while the coiffure and tiara appear to be the same.
Keywords: 1892, Kaulbach, Grand Princess Elizabeth, Hesse family, Romanov family, Princess, Grand Princess, Russian, curly coiffure, tiara, vee neckline, elbow length puffed sleeves, natural waistline, waist band, floral bodice ornament