Kalmar
The name Calmar had long had the genitive form Calmare. Even in the so-called Kalmarvisan it is spoken of as "Kalmare town". A 17th-century ship known from early Swedish emigration history was called Calmare Nyckel, a name that still occurs in various contexts. In today's Standard Swedish, place names ending in a vowel do not receive the genitive s in established fixed compounds, while place names ending in a consonant do. The genitive-e in the word Kalmar, which has been removed today, explains why the grammatical form of the name violates this rule. It is thus "Kalmar län", "Kalmar domkyrka", "Kalmar Slott" and so on, without -s, and respectively "Blekinge län", "Lund domkyrka" and "Ovanåkers kommun", "Wismar town hall". In more occasional constructions, the word Kalmar has the genitive-s in the usual way, for example "Kalmar's population."