John 2nd Earl of Egmont (1711-1770) and His Family Hugh Barron (1745-1791)

The picture has something of this: people, group, woman, veil, kneeling, man, wear, saint, Mary, baby, seat, child, two.
Perhaps it’s a painting of a group of people standing next to each other in front of a man in a red coat and a woman in a white dress.