upper-class family; good family
Refers to a family of high social standing, wealth, or refinement. Often used in social commentary or descriptions of upbringing.
She comes from an upper-class family.
Children of upper-class families are raised with strict etiquette.
上流階級 refers to the upper class as a social stratum, while 上流家庭 specifically denotes an individual family belonging to that class.
Compound of 上流 (じょうりゅう, 'upper stream; upper class') and 家庭 (かてい, 'home; family'). The term follows a straightforward compositional meaning.