If the "theme" or link isn't obvious, what's the problem? I see nothing wrong with any siblings having names that link them in some way, as long as it is well thought out, tasteful, and the names are loved by the parents. Not to mention, some people who aren't as name-nerdy as many BtN posters, may name their children names with similiar meanings without realizing it.
Take for instance, siblings named
Naomi Lilith,
Miriam Eve, and
Caleb Aaron. These names were picked, and the connection discovered later. (Not the biblical one in general, I knew they were all biblical, but the connections between the biblical characters).
"No one can make you feel inferior without your consent."
-
Eleanor Roosevelt