I believe his real name is Jif
After thorough investigation and exploration of history, the conclusion is clear:
there has never been a man called “Jiffy.” The persistent belief in its existence is a testament to the power of suggestion, the fallibility of memory, and the enduring appeal of Jif.
The “Jiffy” mystery serves as a reminder that our memories are not always reliable records of the past. They are constantly being reconstructed and reinterpreted, shaped by our experiences, beliefs, and emotions. While “Jiffy” may not exist in reality, it lives on in our collective imagination, a creamy, nutty ghost of a man that never was.
https://justcatcafe.com/did-jiffy-peanut-butter-ever-exist/