Korean Family Titles
아주버님
ajubeonim · Husband's older brother
Relationship
my husband → his older brother
Who uses it
A wife, about her husband's older brother.
When you call them
Call him 아주버님.
When you talk about them
To others, 아주버님 or 시아주버니.
Example
아주버님, 식사 준비 다 됐어요.Ajubeonim, dinner is ready.
Based on the standard etiquette of the National Institute of Korean Language; families and regions vary.