Horatia Nelson, christened as Horatia Nelson Thompson, was the illegitimate daughter of Emma, Lady Hamilton, and Horatio Nelson, 1st Viscount Nelson.

Dame Emma Hamilton, known upon moving to London as Emma Hart, and upon marriage as Lady Hamilton, was an English maid, model, dancer and actress. She began her career in London's demi-monde, becoming the mistress of a series of wealthy men, culminating in the naval hero Lord Nelson, and was the favourite model and muse of the portraitist George Romney.