Did you know that Fanny Chamberlain's step-uncle was George F. Root, a popular composer and songwriter in the nineteenth century?

In the 1850s, Fanny's adoptive father (biologically her cousin) surprised everyone in their family by taking a second wife. His new bride was Helen Root, a young woman only a few months older than Fanny, yet she had to get along with her as her new stepdaughter. Miss Root's older brother was George Root.

From Wikipedia:

He became particularly successful during the American Civil War, as the composer of martial songs such as Tramp! Tramp! Tramp! (The Prisoner's Hope), Just before the Battle, Mother, and The Battle Cry of Freedom. He wrote the first song concerning the war, The First Gun is Fired, only two days after the conflict began with the bombardment of Fort Sumter. He ultimately had at least 35 war-time "hits", ranging in tone from the bellicose to the ethereal. His songs were played and sung at both the home front and the real front. Tramp, Tramp, Tramp became popular on troop marches, and Battle Cry of Freedom became well-known even in England.