Sune is a name which is either a male or female name depending on country. It is an Afrikaans

Afrikaans

Afrikaans is a West Germanic language, spoken natively in South Africa and Namibia. It is a daughter language of Dutch, originating in its 17th century dialects, collectively referred to as Cape Dutch .Afrikaans is a daughter language of Dutch; see , , , , , .Afrikaans was historically called Cape...

 name given to female children.
Sune is also an old Nordic

Nordic countries

The Nordic countries make up a region in Northern Europe and the North Atlantic which consists of Denmark, Finland, Iceland, Norway and Sweden and their associated territories, the Faroe Islands, Greenland and Åland...

 name given to boys. It is derived from an ancient Nordic word for "son".

Origins

The name is believed to be a hybrid name with origins in the Dutch and local native dialects of South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

. Its commonly accepted meaning is "Song of God" and is usually given to female children.

Many of the original Afrikaans settlers were devoutly religious and it was not uncommon to give thanks to the creator in word or song. A story is told that a local holy man had a vision in which this name would be given to a female child who would bring many people back to a deep belief and loving relationship with God.