Born at the Hague in 1736, Jacob Xavery is remembered for his paintings of historical subjects, landscapes, portraits, sea-ports, fruits, flowers and bas-reliefs. His father was a sculptor and sources cited his name both Jacob and Jan Baptist. Along with his brother, Jacob the son, studied painting with Jacob de Wit. Little is known of his personal life. He was in Paris in 1769, Soho in 1788 and 1789 and exhibited two years at the Royal Academy. He is best remembered for his flower paintings and his advanced techniques in watercolor.
He is known to have painted the portraits of M. Braamcamp and the sculptor Cressant.
Frans (Francisco) Xaverius Xavery, a Dutch painter was listed as both Jacob's uncle and brother as was Gerard Joseph Xavery on contradictory sources. Unfortunately, historical accounts have confused the brothers and the uncle and since they painted similar subjects, a few of their works may have been improperly attributed.
Jacob Xavery died in 1769.
Rather than try to research this family further, I'm relying on auction house records for the provenance of the paintings attributed to the famous Dutch painter Jacob Xavery (1736-1739).