Which Reminds Me

The father of my great-grandmother was possibly French Canadian, although nothing is known of him, just that he died in 1895. The mother of my great-grandmother died when she was a small child and he later remarried and had another daughter named Esther. My grandmother is also named Esther but my grandmother is not the other Esther of whom nothing is known, just that she existed. Someone was talking about the other Esther but I have no clue what they are talking about. I only know of my own grandmother, Esther.