This is a great point. I definitely think there's a line between "unique" and "what are your parents' trying to prove?"
Have you ever noticed that it is very, very unusual for a woman to name her daughter after herself? My opinion about this is that women don't have the conceit that men have: "Look at me. I'm something special, so I'll give my son my great name."
Many moons ago I worked in Sears credit collection department and you cannot imagine how many accounts got mangled because the father's payment on his account got applied to the account of his son, who had the same damn name.
It’s definitely more unusual for a mother’s name to be passed along. That just follows our patriarchial society (not saying that as a political matter, just stating a fact.)
However, my mother was named after her mother, though they had different middle names.