Yolande Kernoghan (52), who managed the Randalls-owned Old Portelet Inn, was described as a valued member of staff with a ‘great personality’ who was always smiling.
She had previously managed the Boat House in St Aubin and the Le Hocq Inn.
The States police confirmed they were called to a flat at the pub at around 11am on Tuesday following a sudden death.
In a statement, Randalls said: ‘Her colleagues and friends at Randalls are devastated at this unexpected news.
‘She was a valued member of the Old Portelet Inn team and worked tirelessly for the business.’
The pub was closed on Tuesday and reopened on Wednesday.
In a Facebook post, Randalls said: ‘It is with deep regret that Randalls have to tell you that Yolande, the excellent manageress of Old Portelet Inn, passed away suddenly in her sleep.
‘Our thoughts are with her family.
‘Yolande was a great personality who has worked in hospitality in Jersey for many years and was known and loved by customers and colleagues alike. She always had a smile and will be deeply missed.’
In tributes posted on Facebook, Melissa Nobrega described Ms Kernoghan as a ‘beautiful person’.
Ann King said: ‘Yolande was always helpful and so very kind and a wonderful lady to know. We will miss her greatly, we will never forget her. Our sincere condolences to her family and friends.’
Chloe Gilmour described her as ‘the most amazing, kind-hearted and funny boss’, while Carole Oliver said it had been a ‘privilege’ to work with her.
The case is currently with the Viscount’s Department.