異い姓せい

noun

different surname; different family name

Used when comparing surnames, often in contrast with 同姓 (same surname). Common in contexts like marriage, family registers, or distinguishing people.

Antonyms: 同姓

• 結けっ婚こんしても異い姓せいのままの人ひともいる。

  Some people keep different surnames even after marriage.

• 同どう姓せい同どう名めいだが異姓、いせいの別べつ人じんだ。

  They have the same given name but different surnames; they are different people.