Speaking of discarded/dubiously canonical material, Laws and Customs Among the Eldar is a contentious text but I admit I find the lore around Noldorin naming practices to be fascinating
According to the in universe narrator in LaCE, the child is given a name by their father and usually though not always by their mother. As they grow up they also took on one or more chosen names. It was also said that some elven mothers had a sense of foresight, and this was sometimes a component in the mother-names. These names were considered especially powerful and were called essi terencenyƫ or names of foresight
There was a ceremony dedicated to the chosen names called EssecilmĆ« (name choosing). It was held after the child had developed what was called lĆ”matyĆ”vĆ«, meaning āsound tasteā, which was defined as individual pleasure in the sounds and forms of words.Ā Elven children were said to develop this at around seven years of age and could then take pleasure in word play and phonetic arts. This itself is such a cool concept to me!
The chosen name was held as extremely important and it was seen as a violation of sorts to use it without permission, especially if you are not close. Names have power and power can be abused.
