I know the history of the discovery of the rare earth elements, that they were discovered near the village Ytterby in Sweden in the 19th century. Four elements are directly named after that village: erbium (Er), terbium (Tb), yttrium (Y) and ytterbium (Yb).
Why are they named like this? It makes sense to name one element after the locality, but why name the rest as misspellings of that village? It's not like we have ermanium, germium and ermium in addition to germanium (although we do have holmium).
This site mentions this:
In 1842, Swedish chemist Carl Gustaf Mosander separated the "yttria" component found in the mineral gadolinite into three segments that he called yttria, erbia and terbia.
Is the any record as to why Mosander chose these names? Because...
As might be expected considering the similarities between their names and properties, scientists soon confused erbia and terbia.