弟おととおととMeanings1nounyounger siblingarchaicArchaic reading of 弟; in modern Japanese, 弟 is read おとうと. This form may appear in historical texts or classical contexts.古こ文ぶんでは「おとと」と読よむ例れいが見みられる。In classical literature, there are examples where 弟 is read as おとと.