Fortinbras Took I
Born in 2745 of the Third Age, Fortinbras Took I became Thain of the Shire. He was the son of Thain Ferumbras Took II. Fortinbras became twenty-fifth Thain of the Sihre after his father's death in 2801. Fortinbras Took I had a son named Gerontius Took, who became the second oldest Hobbit in recorded history. Fortinbras died in 2848 and his son became Thain.
References
The Lord of the Rings, Appendix C: "Took genealogy," page 381
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