Fortinbras Took II
From Tolkien Gateway
The grandson of Gerontius, the Old Took, who inherited the title of Thain from his father, Isumbras IV. He became Thain just two years before Bilbo Baggins left Hobbiton for his adventures in The Wild. He married Lalia Clayhanger, who was to become a famous matriarch of the Took clan, and came to be called Lalia the Great.