[1] Sivar Arnér was born at Arby parish in Kalmar County, Sweden.

His brother Ivar Arnér (1921–1986) was an economist and chief financial officer of Gothenburg Railways.

Arnér also published a number of dramas including Fem hörspel (1959) and Drottningen (1984).

They were the parents of Elias Arnér (born 1966), noted professor in biochemistry at the Karolinska Institutet.

[4] Sivar Arnér died during 1997 in Stockholm and was buried at Voxtorp Church, Kalmar County.