姓 (Kanji for family name)

Onyomi

SEI

SAY you'll be my wife, my woman for life, and take my family name?

せい	last name (only used on a form to indicate where you're supposed to put your family name.(and then your first name, like this: (姓＿＿＿＿名＿＿＿＿＿)) LAZY NP ★★★☆☆

姓名(せいめい)

full name ★★☆☆☆
姓 (family name) + 名 (name, famous) = 姓名 (full name)

one's full name - first and last names.

	Meaning	Hint	Radical
姓	family name	BORN	生
妊	pregnant	KING	王

The person BORN to a woman takes her family name, but the pregnant woman is like the KING who rules her baby.