Just happened to be reading this thread.
Frank X Culkaltenbach born Dec 1878 NY Stepson
living in home of Emil Hoefle and spouse Mary
1900 US Federal Censushttp://search.ancestry.com/Browse/view.aspx?dbid=7602&pa...
Someone must have shortened the name or the census taker wrote it down wrong. As you look at the census you see someone has revised his younger sister Matilda M. surname to Kaltenbach.