Lady Louisa, born at Duneagle, is the eldest sister of Hugh MacClare, Marquess of Flintshire and Lady Agatha, the sister-in-law of Susan MacClare, Marchioness of Flintshire, the granddaughter of the Countess of Newtonmore, the aunt of James MacClare, Lord Newtonmore, Lady Annabelle and Lady Rose MacClare and the aunt-in-law of Annabelle's Husband.
Notes Louise's surname may be MacClare, for we do not know if she has ever been married. Her current whereabouts are unknown: she may be married and away from Duneagle, or she may be deceased.
- 2012 Christmas Special (仅提及)
- Matthew: "Why are the Flintshire's based in Scotland, when the title's Welsh?"
- Robert: "Oh, Shrimpie's Grandmother was Countess of Newtonmore in her own right - it's now their courtesy title."
- Matthew: "Dare one ask why he's called Shrimpie?"
- Robert: "It was nursery game: Louisa was a lobster, Agatha was a shark - which is easy to believe - and I suppose Shrimpie was a shrimp."
- — Robert and Matthew in September 1921[src]