The family you are looking for appears in the 1930 census for Queens, NY (dist 502). They are: Robert age 65, born in Germany, a baggageman for the railroad, his wife Malvania, age 54, born in New York, a housewife, son Henri, age 34, born in New York, a traffic manager for a steel company, and Robert age 22, born in the District of Columbia , working as a chauffeur. There is no mention of Ethel, but by then she would probably have been married. They were living at 9159 89th St, Queens, NY at the time of the census. If you need any further information please contact me directly at: maureendougherty@comcast.net.