Coburg Peak on Trinity Peninsula in Antarctica is named after the Bulgarian royal house of Saxe-Coburg-Gotha.
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Boydell Glacier, on Trinity Peninsula in northern Graham Land in the Antarctic
This application of the name, recommended by the UK Antarctic Place-Names Committee in 1948, commemorates Captain Jules Dumont d'Urville's 1838 exploration of the Trinity Peninsula area, which he had named "Terre Louis Philippe," after Louis Philippe I, the King of France at the time.