同どう姓せい

noun, noun which may take the genitive case particle 'no'

same surname; same family name

Refers to sharing the same family name, not necessarily being related. Often used in contexts like 同姓同名 (same surname and given name). Antonym: 異姓 (different surname).

Antonyms: 異姓

• 彼かれは私わたしと同どう姓せいだが、親しん戚せきではない。

  He has the same surname as me, but we are not relatives.

• 同どう姓せい同どう名めいの人ひとがクラスに二人ふたりいる。

  There are two people with the same full name in the class.