Arne Ole van Erpekum Sem (May 19, 1873 – 1951) was a Norwegian singer, vocal teacher and music critic. He made his debut as Max in Der Freischütz, by Carl Maria von Weber.
Erpekum Sem was born in Oslo, but grew up in county Vest-Agder, southern Norway.
Yngvar Lillesund,'Sorenskriversonnen fra Mandal som ble verdenskjent kunstner,' Lindesnes Frisinnet Folkeblad for Vest-Agder (May 19, 1973): 1 and 4.