Using coincidences or near coincidences to support legends is suspect at best. Everything date, birth, event etc has coincidences that can be made.
Take for example, my birth date, March 8th (that's my real birth date). Now if i wanted to find coincidences for say, why i'm so clairvoyant in predicting the stock market, understand that on March 8th, 1817 the New York Stock exchange was founded. Furthermore, 200 years later, on the 200th anniversary year of the New York Stock Exchange, I had my best year ever, gaining 8 percent across my entire stock portfolio and it was the 8th year in a row i made a gain since the 2008 stock market crash. Coincidence?!
See how that works? Given any birth, war, historical event, date, legend, death, etc etc and you can make all kinds of coincidental connections to sow the seeds of some conspiracy, coverup, mystical event, legend, or any narrative you are trying to promote.
Facts solves cases, not coincidences. Most all legends are made up of loose associations and coincidences, all wrapped in an impossibly implausible tale, that forces one to suspend disbelief and ignore all semblance of logic and facts that are counter to the story.