68-year-old Ramakrishna Manja, who is the eighth among the siblings, said today he has approached the Guinness authorities on February 12 with their claim.
The Guinness authorities responded the next day and have asked Ramakrishna to give proof of date of birth of the family members--eight brothers and five sisters.
The Manja family, which was brought up at Kargal Colony near the famous Jog Falls in Shimoga District, has also been asked to send two photographs one--of all 13 siblings--and other is of the entire family.
Ramakrishna, a retired registrar of the Chennai-based Institute of Mathematical Sciences who is settled in Bangalore, said he approached the Guinness authorities after seeing a news report on February 11 about a family in London entering into Guinness World Records claiming to be the oldest family.
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"That is when I started totalling the age of my siblings," he said, adding, "when I totalled it was 880 plus more than that of the London family, that is when I filed an application staking our claim."
"In fact our eldest sister aged about 73 years died a couple of years back; otherwise the combined age would have come to over 950 years," he said. The age of the siblings currently ranged from 56 years to 79 years.
"I am really elated to say that ours is the oldest living family on this earth if we go by the Guinness World Records," he said.