You are right the Shrock family isn't large compared to many other lines therefore it can be relatively easy to trace your lineage. It would be my guess that all Shrocks are related somewhere down the line. Type in Shrock family DNA in your search bar. This is a great place to start. Contact the lady who put the web page together and ask her questions that might help you get started on your search. My family is mentioned in the section "Ethnic diversity". I am a direct descendent of the white farmer and the black girl who lived in Texas. Best of luck in the search for your ancestors. Once you start there is no turning back. I may be of some assistance if you have any ancestors who lived in Texas, Louisiana, Mississippi, North Carolina or Pennsylvania because they could be part of my line. Please keep me posted and keep in touch.