235 .pem, .cer and .der are all file extensions for files that may contain a X.509 v3 certificate. The .der extension DER is the method of encoding the data that makes up the certificate. DER itself could represent any kind of data, but usually it describes an encoded certificate or a CMS container.
Others like Young's understand a distinction and translate each differently: Jehovah and Jah. If יהּ is a distinct name, can אהיה be parsed both as א ה יה, I-the-JAH and I AM, א היה?