Franz Zacharias Ermerins (also Franciscus, Frans, François) (8 November 1808 in Middelburg – 29 May 1871 in Groningen) was a Dutch physician and medical editor whose literary work encompassed Hippocrates and ancient Greek medicine.
His practice soon prospered, but he continued his study of his beloved Greek doctors, to which he devoted all the time he could spare from his daytime occupation.
In 1839 his love for the classics induced him to move to Paris, to work full-time at the royal library on transcribing and organizing of ancient manuscripts, in particular those of Aretaeus.
He took up this appointment on September 12, 1844, with an inaugural lecture entitled de veteris medicorum interpretis munere a medicis non recusando.
In spite of this busy schedule, he completed after ten years his main work Hippocratis et aliorum medicorum veterum reliquiae, which was published in three volumes by the Royal Netherlands Academy of Arts and Sciences, of which he had been a member since 1855.