Longevity is defined as "long life". My great-grandmother, Ingrid "Ida" Olauson Seeber, lived to one hundred and one years old. I am awarding the title of "Longevity" to her!
I don't know for certain where her longevity came from. Her parents died at ages fifty-four (her mother) and seventy-five (her father). Although, I guess for the time (1925) after living in North Dakota for years perhaps seventy-five was considered a life of longevity. And as I look at Ingrid's grandparents, Ingrid's paternal grandfather lived until age seventy-six (died in 1900). So I am going to make a reasonable guess that Ingrid's longevity came from her father's side of the family.
Ingrid's sister, Elise, lived to age ninety-four. None of her other four siblings lived past age seventy-three.
However, Ingrid's children lived to ages ninety-seven, eighty, eighty-one, eighty, ninety-four, and fifty-three.
An interesting pattern for the family is that it seems to always be the oldest child that lives the longest. Ingrid's father was the eldest, Ingrid was the eldest and Ingrid's child who lived longest was also the eldest.
Below is a picture of Ingrid and her sister Elise taken on Ingrid's one hundredth birthday! Ingrid is on the left.