The Crazy Gang - Apache Dance

The Crazy Gang intro and including the speciality Apache Dance taken from Okay For Sound 1937 - ouch!!! Thanks to the research of recneps2001, in January 2008 we learned the following:
They are Lucienne and Ashour, first recorded performing this speciality act in Berlin's Wintergarden Theatre in 1931, so presumably German. They are also in London in 1936 at the Palace Theatre, possibly after moving from Paris, since they are billed as French Boy and Girl. They appeared in this Crazy Gang film in 1937 after performing with them on the London stage, but the next mention of them is wartime, 1940-41, in San Francisco.

Their other film performances are in Alan Dwan's 1943 Around the World and two Hollywood films in 1950, Chain Lightning (with Bogart) and Woman of Distinction, with Rosalind Russell. In 1952, they are billed in a nightclub in Boston with the surname Hockney. They may have signed off on comedian and chatshow host George Jewell's final TV show in 1954.

I suspect they may be Jewish, their moves suggesting they were keeping one step ahead of Hitler. If any of their surviving family or friends have further information, or anyone can trace these film titles, I'd be pleased to hear. I can provide an address if confidentiality is required.