Johannes Albert Prinz von Sachsen-Coburg und Gotha, Herzog von Sachsen

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Johannes Albert Leopold Frederick Christian of Saxe-Coburg-Kohary, Hereditary Prince of Kohary and Duke of Saxony, in Slovak: Ján, in Hungarian: János, in German: Johannes Albert Leopold Friedrich Christian von Sachsen-Coburg-Kohary (born Innsbruck, 17 November 1969 - killed in skiing accident, Ortler, 21 August 1987) was a German royal (prince from the house of Saxe-Coburg-Gotha) and presumed heir of his maternal uncle, the childless Emmanuel, Margrave of Meissen, Head of the Royal House of Saxony.

Johannes was the only child of the Princess Mathilde of Saxony, the youngest daughter of Frederick Christian, Margrave of Meissen, thus a granddaughter of Frederick August III of Saxony who was deposed in 1918. Mathilde's brothers did not have any children, and her elder sister Anna's issue with Roberto de Afif were deemed lower-born than the uncontested dynastical prince Johannes. Because his maternal uncles were already middle-aged and in apparently barren marriages, Prince Johannes was groomed from his youth to become the heir of the remarkable material possessions and royal traditions of his mother's family.

However, Johannes died at seventeen on 21 August 1987 in a skiing accident. This left his mother's family without a clear dynastically eligible heir, and also left his father, the Prince of Kohary without a direct male heir.

Johannes also was the only son of John Henry of Saxe-Coburg, 10th Prince of Kohary (born 1931), who survived his son. Johannes Henry has since 1945 held the Headship of the Slovak princely house of Kohary, an Austro-Hungarian family of high nobility, whose former princely holdings were C(abrad and Sitno, lost to communist regime of Czechoslovakia. The next males of the Kohary descent are his nearer cousins who were born of a morganatic marriage (and whose branch has hitherto been deemed ineligible to succeed to Kohary rights), and his more distant cousin, ex-King Simeon II of Bulgaria with his sons and grandsons. Prince Johannes also has one half-sister, Princess Felicitas of Kohary (born 1958), who is married to Sergey Trotzky, but females take a more distant place in the Kohary succession than agnates.

Prince Johannes' death forced his maternal uncle to examine other possibilities for inheritance of the royal Saxon succession after himself. In 1900s, he decided to make Johannes' first cousin Prince Alexander of Saxe-Gessaphe as his primary heir, but that arrangement seems to be controversial within the dynasty.

Prince Johannes' prominence is based on his position as nodal point in contemporary royal genealogy, and his unfortunate death which left yet more problems to more than one dynasty.

Prince Johannes died in a skiing accident at Mount Ortler Austria having previously been chosen by his uncle, the Margrave of Meissen as the heir to the Royal House of Saxony