noun
adult name; name taken upon coming of age
Historical term for the name a person adopted at their coming-of-age ceremony (genpuku), replacing their childhood name. Rare in modern usage outside historical contexts.
平安時代の貴族は元服の際に烏帽子名を授かった。
Heian-period nobles received an adult name at their coming-of-age ceremony.
From 烏帽子 (eboshi, a type of headgear worn during the coming-of-age ceremony) + 名 (na, name). The exact historical derivation is uncertain, but the term is associated with the Heian-period practice of taking a new name at genpuku.