Would anyone like to help me or advise me on how to confirm that I'm genetically descended from my 3x and 4x great grandfather's?
For context I took a 23andme DNA test, and it said that my paternal haplogroup was R-L226 and it came from Ireland. My paper trail leads to Germany, which is why I believe there was an NPE event that occurred between me and my German immigrant ancestor. I'm able to confirm the connection between myself to my great-grandfather. With my 2x great grandfather, I believe I can confirm him based on my shared DNA matches from Ancestry. But with my 3x great grandfather George May (1826-1902) and my 4x great grandfather Jacob May (1768-1869) I'm not for sure if these are truly my genetic 3x and 4x great grandfather's.
With George May (my 3x great grandfather), I share DNA with a few matches through him and my 3x great grandmother. Though I sort of have a 70%-80% estimate that George is my biological 3x great grandfather. The only thing that I'm wondering is that in George's obituary it doesn't list my 2x great grandfather Landon Maye (1855-1932). Along with some matches sharing small amounts of DNA, this is the main reason as to why I sort of speculate as to whether or not George is Landon's biological father or not, but other than that I think I might be able to confirm my 3x great grandfather as my genetic ancestor.
But with my 4x great grandfather Jacob May it's a completely different story. With Jacob I suspect about a 10%-20% that he is my biological 4x great grandfather, because I heard from other branches of the family that my 4x great grandmother Elizabeth May, had 4 children all from different men. Elizabeth's maiden name was May, but a distant cousin told me that a family member of theirs said that Elizabeth never married. This distant cousin believed that she did marry Jacob, but people thought she never married due to both of their last names being the same. But there haven't been any marriage records found between them which speculates whether or not the rumor was true or if she got married and the record was just lost over time.
If either my 3x great grandfather or 4x great grandfather isn't my biological ancestor, how should I go about it to find who my real 4x great grandfather is and possibly 3x great grandfather if I'm not descended from him. Most of the distant cousins that have already tried to do research about this hasn't signed into Ancestry in over a year, and my family doesn't know much through my paternal line due to my great grandfather dying when my grandfather was 13 years old. I would greatly appreciate any assistance on this. Also, if there is anything that is vague or unclear in this post let me know and I'll clear it up.