Why was element 72 named hafnium?

Element 72 was named hafnium in honor of the city of Copenhagen, where it was discovered in 1923. The name is derived from Hafnia, the New Latin name for Copenhagen.123

The discovery was made by the Dutch physicist Dirk Coster and the Hungarian-Swedish chemist Georg Charles von Hevesy, who were working at Niels Bohr’s institute at the time. Their successful identification of the element through the analysis of X-ray spectra served as a significant experimental validation of Bohr’s atomic theory regarding the structure of the periodic table.12