ruby's pre-natal nickname was given to her by aunt ellen's friend blair, or as molly used to call him, "that guy." molly didn't take long to warm up to blair, but it did take a while for her to remember his name. this is probably in response to the fact that blair couldn't quite get her name right: he kept referring to her as the penguin instead of the pigeon.
we hadn't really come up with the right in-vitro name for molly's little sibling, and penguin somehow morphed into ruby's moniker. so in those last few months living in mommy's belly before she was born, we referred to ruby as the penguin.