도련님

doryeonnim · Husband's younger brother

Relationship

my husband → his younger brother

Who uses it

A wife, about her husband's younger brother.

When you call them

While he's single, 도련님; once married, 서방님. Some families now prefer his name + 씨.

When you talk about them

To others, 시동생.

Example

도련님, 졸업 축하해요!Doryeonnim, congratulations on graduating!

Based on the standard etiquette of the National Institute of Korean Language; families and regions vary.