noun
Matsuya (place name or surname)
Used as a place name or family name. Not a common noun.
彼の名字は松屋です。
His surname is Matsuya.
noun
Matsuya (department store)
Refers specifically to the Matsuya department store chain. Not a generic term.
銀座の松屋で買い物をした。
I shopped at Matsuya in Ginza.