Gerontius "The Old" Took was a Hobbit of the Shire and the 26th Thain of the Shire. He was best known for being the third oldest Hobbit in Middle-earth's history, living to the ripe old age of 130 years. Only Bilbo and Gollum, whose lives were prolonged by the powers of the Ring, lived longer.
Gerontius was born in TA 2790 (SR 1190) and was a friend of Gandalf, and was a direct ancestor to the majority of the famous Hobbits. His great-uncle in the Took family was the renowned and large Bullroarer (Brandobas) Took.
Gerontius married Adamanta Chubb and had twelve children; eight sons: Isengrim III, Isumbras IV, Hildigrim Took (great-grandfather to Peregrin Took and Meriadoc Brandybuck), Isembold, Hildifons, Isembard, Hildibrand (great-grandfather to Fredegar Bolger), and Isengar; and four daughters: Hildigard, Belladonna (mother to Bilbo Baggins), Donnamira, and Mirabella (grandmother to Frodo Baggins). He was Thain for 72 years at the time of his death in TA 2920 (SR 1320).