1/4 plate double Ambrotype woman & chidren, full Union case

1/4 plate double Ambrotype woman & children. Amazing clothes, tinted, full Union case. The case measures 5x4 and is split. There is a CVD card that was with it. I know they are related some how. I personally think it's one of the children. There is writing on the backside of the card that is unreadable.

Thanks for looking and have a nice day.