[1] Nanna Oscara Maria Nicolina Westin was born in Södertälje, Sweden.

She was the daughter of landowner Carl Oscar Westin (d. 1850), who owned the Hjortsberga estate [sv], and Thora Johanna Arvidsson.

Her father died bankrupt, and both she and her mother made a living as governesses until their marriages.

She became the owner and managing director of August Hoffmanns pianofabrik [sv] ('August Hoffman Piano Factory') in Stockholm after the death of her husband in 1884.

On his deathbed, August Hoffman advised Nanna to give up factory production and sell other pianos instead.