My Great-Great-Great Grandmother was Charlotte Litolff (born London). Charlotte's brother was the composer Charles Henry Litolff and their father was Martin Louis Litolff. Martin Louis Litolff was from Alsace in France and was a violinist. He was in Napoleon's army and was captured during the Peninsula War (1808) and brought to London as a prisoner-of-war. He later married Sophie Hayes and settled in London as a civilian.
I have more information, family trees etc if anyone would like to exchange information.
I am always pleased to hear from my distant cousins, so feel free to e-mail me!