Catherine Hallett was the daughter of Elizabeth (née Lamb) Willson Hallett by her second husband, Samuel Hallett. Catherine married the Reverend Dr. Sinott. She inherited from her mother a portrait probably of Samuel, the brother of Elizabeth's first (late) husband, Joseph Willson. The painting (NGA 1957.11.9) was in turn inherited by Catherine's daughter, Catherine Sinott Boone.