Family business

A family business was a business run by members of a family.

Château Picard was a Picard family business (TNG: "Family"), as was the Boimler family raisin farm. (LD: "Grounded")

Ezri Dax made a point of knowing very little about her family business. Flustered by the reams of paperwork, she remarked in 2375 that she now knew why she never went into the family business. (DS9: "Prodigal Daughter")