According to her article in thepeerage, her maiden name was Louise Emily Harford. She married Henry Adelbert Wellington FitzRoy Somerset, 9th Duke of Beaufort, in 1895 after her first husband, Karel Frederik, Baron van Tuyll van Serooskerken, had died. "Frankie" was Baron van Tuyll van Serooskerken's child. She bore another child by Baron van Tuyll van Serooskerken and three by the Duke of Beaufort.
From eBay; sepia tone removed.