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Rose Champion de Crespigny (born Annie Rose Charlotte Key; 9 November 1859 – 10 February 1935) was an English artist and author.

Rose was the daughter of Admiral Sir Astley Cooper Key (who later changed the surname to Cooper-Key) and his wife, Lady Charlotte Lavinia (née McNeil). She was born 9 November 1859 in Kensington, and she was baptised 15 December 1859 at St John's, Notting Hill.
As an artist, her paintings tended toward landscape; her writing, after early forays into genealogical and local history, soon settled into popular fiction. Her work was described in a contemporary review as having "a certain graceful facility"
Rose married Royal Navy officer Philip Augustus Champion de Crespigny (1850–1912) on 1 October 1878 in Westminster. They had four children:
- Henry Champion de Crespigny (1882–1946)
- Frederick Philip Champion de Crespigny (1884–1947)
- Edmund Alexander Champion de Crespigny (1890–1905)
- Phyllis Rose Champion de Crespigny (1880–1946), married Dublin attorney W. W. Finny.