Comment by mauvehaus

Fun fact an adder (snake) was once a nadder, and an apron was on a napron. This fun fact brought to you by The History of English Podcast.

https://historyofenglishpodcast.com/

Happily sourced in Wikipedia so I don't have to figure out which episode I learned that from:

https://en.wikipedia.org/wiki/Adder <- see below the table in Taxonomy.