"Angelsea" was a song originating from Great Britain in the 20th century.

Sara Pran Yee performed "Angelsea" on guitar at the memorial service for her mother, Rupi Yee, in 2381. (ST novel: A Singular Destiny)

Keith R. A. DeCandido notes in his novel annotations that this is a song written and recorded by Cat Stevens in 1972.