(Spanish) form of Carmel, altered by folk etymology to the form of the Latin word carmen ‘song’. It is now sometimes found as a given name in the English-speaking world, in spite of, or perhaps because of, its association with the tragic romantic heroine of Bizet's opera Carmen (1875), based on a short story by Prosper Mérimée.
English (Bedfordshire): habitational name from an unidentified place. In Tudor records, the surname is generally spelled Logsden or Loggesden. It may be a variant of Loxton, name of a place in Somerset, or possibly an irregularly altered form of Roxton, name of a place in Bedfordshire (see Ruxton).