When I use the WikiTree search function to look for people with the last name Estenberg, I get 10 hits. Peter Estenberg, the father of most of the Estenbergs listed, does not appear. Estenberg was not his last name at birth, but it is his current last name. When I search using his first and current last names, I can find him, but I cannot get him to show up on the list of all Estenbergs. Is this the way the search system works?