Nial O'Glacan

Irish physician (c. 1563 – 1653)

Nial O'Glacan (Irish: Niall Ó Glacáin; c. 1563 – 1653) was an Irish physician and plague doctor who worked to treat victims of bubonic plague outbreaks throughout continental Europe. He was a physician to Hugh Roe O'Donnell and King Louis XIII. Working as a physician to the prominent O'Donnell clan during the Nine Years' War, he may have followed their chief to Spain after the Siege of Kinsale, where he spent two decades practicing medicine.

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