Kent Police have released this CCTV image showing a man they want to identify, following a report of an armed robbery at a house in Four Elms, near Edenbridge, in the early hours of Tuesday.
A group of masked men broke into the house and entered a woman's bedroom.
She was ordered out of bed while the men stole jewellery, including men's watches. The victim said one of the intruders carried a black handgun.
Three men have already been arrested in connection with the robbery. The man, around 6ft 3ins tall with a thin face, may be local to the Tonbridge area.
DI John McDermott said: "From entry to exit the offenders took only a few minutes. However they put the family through the most terrifying ordeal.
"No-one should be subjected to an ordeal like this. I am determined to track down those responsible and bring them to justice, to answer for this despicable offence before a court of law."
Anyone with information is asked to call Kent Police on 101 or Crimestoppers anonymously on 0800 555111.
More top news
Friday night's forecast for the east of the region
Friday night's forecast for the west of the region
Friday afternoon's forecast for the west of the region