Letterhoarder is similar to namehoarder. This refers to a person who hoards names that start with a specific letter or have a specific theme. For example someone who uses names that start with L. Anyone can use this term and can still use other names. People who identify with this my also be genderhoarder or pronoun hoarder.
History
This was coined by fandom user Lovely.little.ArSoN March 25 2021