HMS Owen Glendower was a Royal Navy 36-gun fifth-rate Apollo-class frigate launched in 1808 and disposed of in 1884. In between she was instrumental in the seizure of the Danish island of Anholt, captured prizes in the Channel during the Napoleonic Wars, sailed to the East Indies and South America, participated in the suppression of the slave trade, and served as a prison hulk in Gibraltar before she was sold in 1884.

Anholt is a Danish island in the Kattegat, midway between Jutland and Sweden at the entrance to the North Sea in Northern Europe. There are 150 permanent residents as of 1 January 2022. Anholt is seven mi (11 km) long and about four mi (6.4 km) wide at its widest, and covers an area of 21.75 km2 (8.40 sq mi). Anholt is part of Norddjurs Municipality in Region Midtjylland. Before the 2007 municipal reform, it was in Grenå Municipality.