The Puttick family funeral took place on 17 July
An inquest will be held into the deaths of "devoted" parents who leapt from a cliff two days after their paralysed child died.
Quadriplegic Sam Puttick, five, died from meningitis at the family home in Westbury, Wiltshire, on 29 May.
Two days later Neil, 34 and Kazumi Puttick, 44, travelled to cliffs at Beachy Head, East Sussex, and fell to their deaths clutching Sam's body.
The East Sussex Coroner is due to hear evidence at Uckfield at 1425 BST.
Sam's body was found in the rucksack about 400ft (122m) down the cliffs. A second rucksack found nearby was filled with toys.
The five-year-old needed round the clock care after becoming paralysed after a crash in July 2005.
Royal National Institute for the Blind worker Neil and Japanese translator Kazumi both left their jobs to care for their son
Since their deaths, family, friends and members of the public have donated £10,000 to Spinal Research in Sam's honour.