Jacques Ferrand was a French physician born around 1575 in Agen, France.
He is famous for his treatise on melancholia, Traicte de l'essence et guerison de l'amour ou de la melancholie erotique (1610), an early psychological work on melancholia.
[1] The treatise on erotic melancholia may have been read by the French writer, Eugène Sue, whose character "Jacques Ferrand" ["Mysteries of Paris"], actually dies from an unrequited passion.
In 1623, Ferrand wrote a book about the uses of bloodletting to cure "heartbreak" and "heartsickness" (figurative).
He posited that the person being cured of heartbreak should be bled almost to the point of literal heart failure and should be plump and in good health beforehand.