Mr Einer Windeløv was born 29 December 1890 in Nyköbing, Odsherred, Själland (Zealand), Denmark, the son of Hans (b. 21 October 1857), a hotel manager, and Anna Hansine (nee Hansen, b. 3 September 1867) Windelöv. His parents had married 2 April 1890 at Holbaek, Nyköbing, Själland, Denmark.
He had a sister, Magda Johanne (b. 16 August 1892) and he seems to have had a step-brother, named Aage.
He had apparently been in Argentina and South Africa, but in September 1911 he was back in Denmark, working as an apprentice in a shop. According to unverified family stories, he had had an affair with a young girl and it is alluded at that they had a son together, born in September 1911.
He died in the sinking and his body, if recovered, was never identified.