03 March 2007
It it Katharine H. the younger who is the well-known actress in this 1920 census enumeration. The Hepburn children all apparently had the same middle name (Houghton) or else the census taker got bored or lazy (grin..). This family's entry is split over two pages, Mr. Hepburn is on last line of the previous page.
Search the 1920 United States Federal Census for your ancestor--hopefully their splits are only due to pagination issues and not marital problems.