It's great to have 'characters' in our families, but if they were like your Richard it's probably best that they were some time ago.
A very good question about the DNA which has got me thinking. I went back to the Ancestry DNA webpages which says:
"..the Paternal Lineage tests provide the DNA results necessary to help find other participants who might be genetically related to you. The Paternal Lineage test analyzes specific segments of the Y-chromosome which is only found in males. And because the Y-chromosome is passed largely unchanged from father to son, DNA results from a male participant today can be used to represent the paternal lineage dozens of generations into the past."
I am reading from this that because it is the Y-chromosome that is handed from father to son you probably need to have one of your mother's brothers or their son's etc to potentially match with other Nevard's (assuming such a brother exists) - essentially someone male with the
Nevers surname. Of course, I write with no real knowledge so there are probably others out there who can set us right.
Failing DNA there is always the hope that as more records are digitised and go on line that elusive missing link will turn up.
Good hunting
Toni