In 2005, the IWM had the ash and bone fragments analysed by a pathologist at the English Heritage Centre for Archaeology, who determined they belonged to five adults and one child.
After a stocktaking of its Holocaust material, the IWM decided last year the remains should be returned to the Jewish community.
The funeral is to take place on Sunday at Bushey New Cemetery at 11am, with hundreds of people expected to attend.
Michael Goldstein, president of the United Synagogue, called on the community to attend the funeral, describing doing so as “the ultimate act of kindness, chesed shel emet in Hebrew, because, as with all burials, nobody can be thanked for what you’ve done.”
Those able to help are requested to e-mail the United Synagogue at ypeleg@theus.org.uk
