Henrietta Spencer ... She passed away in 1821. 
The suffix Countess of Bessborou is non-traditional and may be too long for the WikiTree suffix.
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Henrietta is 11 degrees from Ferenc Liszt, 27 degrees from Frédéric Chopin, 22 degrees from Johannes Brahms, 32 degrees from Clara Schumann, 25 degrees from Fanny Hensel, 34 degrees from Jean Sibelius, 20 degrees from Edvard Grieg, 10 degrees from Richard Wagner, 21 degrees from Antonín Dvořák and 16 degrees from Kathie Forbes on our single family tree. Login to find your connection.