also: ばつなん
noun
youngest son
Refers to the youngest son in a family. Often used in formal or written contexts, such as family registers or introductions.
彼は三兄弟の末男です。
He is the youngest son of three brothers.
Compound of 末 (matsu, 'end, youngest') and 男 (nan, 'man, son'). The reading ばつなん uses the alternative on'yomi ばつ for 末.