noun
old family; long-established family
Refers to a family that has been prominent or well-established in a community for generations, often with historical standing.
彼はこの町の旧家の出身だ。
He comes from an old family in this town.
noun
one's old home; childhood home
Used for the house where one used to live, often with nostalgic or personal attachment; less common than sense 1.
久しぶりに旧家を訪ねた。
I visited my old home for the first time in a long while.