Johan Nordahl Brun Rolfsen (12 June 1848 – 18 January 1928) was a Norwegian writer, educationalist and teacher, journalist, translator and speaker.

He was great-grandson of poet and bishop of Bjørgvin Johan Nordal Brun, and grandson of shipmaster, shipowner and member of the Norwegian Constitutional Assembly Jens Rolfsen.

[2] Rolfsen finished his education at Bergen Cathedral School in 1866, and continued his studies in Christiania.

He worked as a teacher at Aars og Voss' skole from 1870 to 1872 and at Frøken Falsens pikeskole from 1873 to 1876.

Rolfsen worked as a full-time writer and editor the rest of his life, and also as a translator, journalist, researcher and speaker.