Kjartan Sveinsson is an Icelandic musician who is the keyboardist for the post-rock band Sigur Rós. He joined the band in 1998. A multi-instrumentalist, he has also played such instruments as the flute, tin whistle, oboe, guitar and the banjo, as well as many of the unorthodox instruments that contribute to Sigur Rós's distinctive sound.

Ondine is a 2009 Irish romantic drama film written and directed by Neil Jordan and starring Colin Farrell and Alicja Bachleda. The film was shot on location in Castletownbere, and it touches upon the possible existence of the mythological selkie bringing hope and love to humanity.