Examples Of Spoonerisms In Etymology?

Are there any English words in use today that were derived from spoonerisms? For example, I heard that a “butterfly” used to be called a “flutterby” but over time the word was mispronounced and became “butterfly”. Regardless of whether or not that specific example is true, are there any other known examples. I did try googling this, to no avail. Most of the results were either related to the etymology of the word “spoonerism” or just amusing examples of spoonerisms. If there are actually a lot of examples then just a few will suffice. Thanks!