translation needed please

[chatburn]

desperately in need of a translation please. i have been all over the internet and cant figure this out!!!!

 

[Toritoribe]

松井永貞
Matsui (family name) Nagasada (male given name)

Seems like a swordsmith in the late Edo period . (Note that it doesn't mean your sword is genuine. It could be a fake inscription.)

 

[Majestic]

Looks like Matsui Nagasada
松井永貞

Edit: Again, beat by Toritoribe-san!

 

[chatburn]

thank you
i am putting together our geneology for my son so he may understand his family after we are gone. This was my fathers and i wanted to include what it said. real or fake i does not matter. I thank you for helping me !
it has more sentimental value