The funerals of Ruairi and Eoghan Chada will take place in Co Carlow today.
The young brothers - aged 5 and 10 - will be buried this afternoon following requiem mass in their home village of Ballinkillen.
Their father Sanjeev appeared in court in Co Mayo last night - charged with their murders.
The bodies of Ruairi and Eoghan Chada were discovered in the boot of their father's crashed car near Westport last Monday afternoon - less than 24 hours after they were reported missing.
Its believed they were strangled.
The 5 and 10 year olds remains were returned to Ballinkillen near Bagenalstown on Wednesday night - following post mortem examinations at Mayo General Hospital in Castlebar.
Their bodies have been lying in repose in their home since midday yesterday - ahead of their requiem mass at St Lazarian's Church in Ballinkillen at 1 o'clock this afternoon.
The brothers will be buried in the adjoining cemetery.
The chief mourner - Ruairi and Eoghan's mother Kathleen - is expected to be joined by hundreds of people for the mass - including family members, friends and neighbours from the close knit community.
Members of Sanjeev Chada's family from Northern Ireland and Britain - including his mother - will be in attendance - but Sanjeev himself will not.
The 43-year-old - who appeared in court in Swinford last charged with the murder of his two sons - is due before Harristown District Court in Co Roscommon later today.
