Read your message. Not sure what information you are seeking. Have a couple of references such as Abraham died by being struck by lightening but I have not birth or death dates. You gggf Jacob and wife Maria Quiring had at least 8 children but in my source there is no detail of the records for your ggf Cornelius. The record stops there so you have data that I don't have.
Are you familiar with the GRANDMA project. It is where I got my data. If interested let me know.
Have not checked if we are connected but always willing to help those who are searching as other help me.
Ron You can email direct to firstname.lastname@example.org