One starts from oneself going backwards and collecting documents on each generation. Seems you have done that and
found a location Holstein, Austria on what record? Was it in https://www.familysearch.org/search/collection/list
Have you located the location Holstein on a map?
I only put down the Ellis Island arrival being that it is free since I don't have a subscription to Ancestry.
What is the maiden name of the KOTCHAVAR ancestor?