Nantoka/성씨seongssi성씨 (seongssi) is a Korean word meaning “family name; last name”.Meanings1family name2last namePart of speechnounHanja姓氏Related words성surname성함name씨Mr.성명full name섭씨Celsius백성subjects동성same surname동성동본same surname from same ancestor집성촌clan village만백성all people통성명mutual introduction통성명하다mutual introductionStudy Korean with flashcards →