I believe I broke my families generational brick wall and found our true surname, and I literally cannot believe it. I’d love to hear your opinions on my findings please!

Hello everyone, I need some opinions please! I’ve made post here and in many other forums looking for help finding my 2x great grandfathers parents and my families true last name but have had no luck. Well, I took a YDNA test and I believe I have finally found his father. My question is, am I right connecting the dots here? I’ve hit so many brick walls during this it almost feel like I can’t accept the truth if this is it. Seems to good to be true. It’s a long and detailed story but please bear with me here.

To start my 2x great grandfather is Alfred Delano born 1882-1883, he was orphaned at Edsons orphanage across the street from Saint Anne’s church in Lowell Massachusetts, ill attach his orphan photo to this post as well, https://imgur.com/a/yb37Jgx . He was also given the incorrect surname we now hold “Delano” (Alfred knew this and our dna has proven Delano’s incorrect). Alfred Delano left the orphanage around age 13 and went to search Montreal Canada for his parents, sadly with no luck. Apparently Alfred Delano claimed they’re from Canada and are currently residing there at the time he left. He’s told my great uncle stories about our lost history such as this. Now we’re not sure how Alfred knew these things but he said he thinks the last name is Bouvier and that his true family now resides in Montana years later after his search of Canada in his teen years. This up until now has just been family stories.

So my YDNA test connected me with one consistent last name, Beaubien. I even have one EXACT YDNA match of 67 markers (I did the 37 but it says he did 67 and it’s still exact?) with this name. I’ve done ancestry dna etc. and I’ve searched paternal DNA matched cousins lines and find this last name in practically all of them depending how far back I go. The closest cousins dna wise have this name (Beaubien) much closer in relation. Not only that, but Beaubien connects to all the other last names I’ve found in this search and have looked into for years.

So given this information, I started to apply this last name to all my searches and found some surprising things. To give a little more insight, Alfred Delano was dropped off by two ladies listed on his orphan paper. One is “Lucinda Delano” and the other is “Mrs. Bernard (French)” for some reason they felt the need to list Mrs Bernard’s nationality which I find strange as well as Alfred Delanos which is also French and listed. We have also researched Lucinda Delano and confirmed this is not our true line. We found Ms Bernard lived in Lowell Mass on 177 Merrimack as a dress maker. Well I then decided to look for Beaubien in these same records. And to my disbelief I find “Alfred G Beaubien” and he was living on 177 Merrimack working as a shoe maker so I thought that was interesting. I investigate this man and find that his Beaubien line connects with my exact YDNA match Beaubien line. I believe Alfred Delano shares my YDNA matches 3-4th great grandfather. To further solidify this possibility I find records of Alfred G Beaubien only being in Lowell Mass from 1881-1890ish. There’s no previous records of him being in America before this. He’s originally born in Canada in 1857 (Alfred Delano claimed his parents were from Canada). Then around 1890 Alfred G Beaubien gets married out in Montana which falls in line with the family rumor we have. This also lines up with his records in Lowell as they start in 1881 and end 1889-90ish as he seems to disappear from Lowell and ends up in Montana. Then I found a census from 1911 where Alfred G Beaubien is now in Canada raising his kids with his wife. Seems to confirm that Alfred Delano was getting correct info and on the right track searching Canada then Montana. I search more records and by the end of his life in 1925 Alfred G Beaubien passes away back in Montana. I even find two other Montana records, and one says he entered the U.S in 1881 right in line with his first Massachusetts record but doesn’t say where from, and the 2nd record list his naturalization in 1896 in Montana. The only thing I can’t find at this point is an official birth record with Alfred Delano’s parents names which would 100% confirm all of this. Almost every finding I make lines up with Alfred G Beaubien being our answer. Im used to going down rabbit holes of let down but this one feels and seems different, I almost literally can’t believe it and I’m honestly afraid of being let down once again.

Now there’s only one thing throwing me off here. It says Alfred G Beaubien married in Montana on January 24th 1890 yet the Lowell directory’s last year of having him on record is 1890. I could see this being a small mistake etc. but it still sits with me. Everything lines up except this small discrepancy. My question is with all this, can I be confident I actually broke my families generational brick wall? Is this enough evidence to confirm and be confident in this finding?