The couple's 11-year-old daughter and Bhamini's father were the only two to make it out of the fire unscathed.
The young girl reportedly escaped to tell firefighters people were still inside the two-storey house, which was well ablaze, with windows exploding and smoke billowing.
Fire crews worked on putting it out and enabling a rescue crew to get inside, but were unable to save everyone.
This afternoon's funeral will be followed by private cremation and burial for Bareth, the funeral notice stated.
"Kaileshan and his family would like to extend their gratitude to everyone that have offered their support and assistance at this time," it read.
Umadhevi is survived by her husband Theiventhiran and daughter Abina, who live in Canada.
Bhamini is survived by her husband Kailesh and daughter Krishah.
Donations to a Givealittle page, set up by the refugee community, have so far amassed more than $77,000.
It will be used to help with funeral, medical and practical costs for the family.
Thanabalasingham came to New Zealand as a refugee more than 10 years ago and has been described by Manning as someone with "great empathy for others".
"He didn't come to New Zealand to look after himself. He made sure he looked after as many people as he could."