The men, aged 40, 42, 43 and 41, were arrested on suspicion of burglary in the Cheltenham and Evesham area on September 5.
More than £1m worth of antiques, jewellery and silver were stolen in the burglary of Evans’ home Glebe House in Bibury. Among the items taken were three Omar Ramsden and Alwyn Carr Art Nouveau silver rose bowls and four George III silver candlesticks.
The family has offered a “substantial reward” to help recover any of the items.
The suspects are believed to have climbed a 7ft-high wall to gain entry to the grounds.
A CCTV appeal was made last month and anyone who has information about the crime is still urged to call 101 and quote incident 595 of July 9.
As reported in ATG previously, the antiques and jewellery stolen also include a pear-shaped Boodle and Dunthorne diamond solitaire ring, a Cartier platinum and white gold diamond line bracelet, Elizabeth Gage 18ct yellow gold brooch, carved green beryl of The Green Man, an emerald and diamond brooch/pendant by Asprey c.1920 and a gold and amethyst choker by Ilias Lalaounis.
For images of the items stolen see ATG 2357.