Louise Brunet’s calling card

There is no address on this one. What is the meaning of this nearly blank thing, with only the tidy black inscription of a woman’s married name? It means that the woman is of comfortable enough means to bother with such an affectation as a calling card.
But what does it signify when her first name is not on the card? What does it mean that all the names that she was born with are not in fact printed on her calling card? This is a funny thing.