I would think the parents were either very uninformed or had very bad taste. Neither one of the names is bad (no, actually,
Oswald is a really bad name) but together they are so corny and negative. And
Oswald is not a name you ever see as a first name anymore, no other associations except
Lee Harvey, that a
Ruby and
Oswald sibset is just inappropriate. Any denials on the part of the parents that they didn't know about the associations would ring hollow.