Penny's Last Name?? in The Show Posted January 10 I'M pretty much new here so I don't know if this has been discussed in any other threads. I remember during the holidays reading another thread with 16 pages of replies and I couldn't find the answer to this. However this morning I was just going through the days main stories on MSN and it seems a group of fans might of figured it out. Here is the link to the article I read. https://www.msn.com/en-ca/entertainment/tv/big-bang-theory-fans-think-theyve-worked-out-pennys-surname/ar-BBYMGHj?li=AAggFp5 I don't know if I am allowed to attach links or not , I hope I am not breaking any rules. If I am I am sorry and the admins may delete my post, I'll understand. Now I am not claiming that the name found is accurate I am just sharing what I read and I do not claim this information to be mine. I do not know what group of fans found this response. Now I'll just copy and paste what I read. "In a fan theory that's been touted for a while now but is doing the rounds again, it's claimed the truth behind Penny's full name was first alluded to in season two. Namely, when Penny meets Leonard's mum Beverly, played by the brilliant Christine Baranski, for the first time. In an inadvertent therapy session, Penny recounts a story from her childhood to psychiatrist Beverly, recalling tension between her parents in which her mum called her dad "Bob". Later on in the series, when Penny's dad – the artist formerly known as Bob – comes to visit Penny, Leonard calls him Wyatt. In one of the more convincing Big Bang fan theories to date, it's suggested that Wyatt is actually Bob's surname, and by extension Penny's too. So, there you have it. Penny Wyatt it is – until the next (Big Bang) theory comes along."