Stockholm

"small island in a river; river meadow," late Old English, from Old Norse holmr "small island," especially in a river or bay, or cognate Old Danish hulm, from Proto-Germanic *hul-maz, from PIE root *kel- (2) "to be prominent; hill." Obsolete, but preserved in place names, where it has various senses derived from the basic one of "island:" "'raised ground in marsh, enclosure of marginal land, land in a river-bend, river meadow, promontory'" ["Cambridge Dictionary of English Place-Names"]. Cognate Old English holm (only attested in poetic language) meant "sea, ocean, wave."

rare earth element, named by French chemist Lecoq de Boisbaudran in 1886, from holmia "holmium oxide," name of an earth identified and named in Modern Latin by the earth's discoverer, Swedish chemist Per Teodor Cleve, in 1879 from Holmia, Latin name of Stockholm. With metallic element ending -ium. Holmia was isolated from erbia, the Scandinavian earth which also yielded thulium, scandium, and ytterbium.