Around 1919, they changed their name to Claude Cahun, after having previously used the names Claude Courlis (after the curlew) and Daniel Douglas (after Lord Alfred Douglas). During the early 1920s, they settled in Paris with lifelong partner and step-sibling Suzanne Malherbe, who adopted the pseudonym Marcel Moore. The two became step-siblings in 1917 after Cahun's divorced father and Moore's widowed mother married, this being eight years after Cahun and Moore's artistic and romantic partnership began. For the rest of their lives together, Cahun and Moore collaborated on various written works, sculptures, photomontages and collages. The two published articles and novels, notably in the periodical "Mercure de France", and befriended Henri Michaux, Pierre Morhange, and Robert Desnos.