Pratt’s son Henry Lark Pratt changed his name to Hilton to try to avoid confusion with his father but this was to little effect as paintings are found that are signed "H.L.Pratt".
Putra Pratt, Henry Lark Pratt mengganti namanya menjadi Hinton untuk menghindari kebingungan nama dengan ayahnya namun hanya berpengaruh kecil pada lukisan-lukisannya yang bertanda tangan “H.L.Pratt”.