Severin Wielobycki (8 January 1793 – 7 September 1893) was a Polish centenarian physician who lived in Edinburgh and London. A controversial homeopath during a period of scientific focus, his adventurous life ranged from being a soldier in the Krakow Uprising and being a noted botanist, vegetarian, non-smoker and teetotaller. He was fluent in Polish, German, French, Russian and English.