Nils Olov Håkan Hagegård is a Swedish operatic baritone. He also performs lieder and has held academic positions in the United States, Norway, and Sweden.

Helga Görlin was a Swedish soprano and voice teacher. She performed as a resident leading soprano at the Royal Swedish Opera from 1926 to 1951, and later returned as a guest artist at that theatre for her final stage performance in 1954 as Cio-Cio San in Puccini's Madama Butterfly. A frequent romantic stage partner of tenor Jussi Björling during the 1930s and 1940s, she notably portrayed the role of Minnie in the Swedish premiere of Puccini's La fanciulla del West in 1934 with Björling as Dick Johnson. She also created roles in the world premieres of operas by Kurt Atterberg, Natanael Berg, and Hilding Rosenberg during her career.