Mum, Dad and two young sons were found dead last weekend.
The inquest into the deaths of a family in Pudsey will begin on Thursday.
13-month-old Aaron Smith was stabbed and his 9-year-old brother Ben died of suffocation at Sheridan Way last weekend.
Their mum Clair also died after being stabbed and father Richard died of smoke inhalation.
The bodies were found in a fire-damaged bedroom at a detached house on Sunday December 11.
West Yorkshire Police launched a murder enquiry but aren't looking for anyone else involved.