One of the most "Tookish" of the Tooks, Isengar adventured on the sea from Annon Baran as a young man. Although virtually no record survives of his adventures, Isengar was noted by his peers as being a chief example of the aggressive and curious Tooks. As is well known, very few of the Shire Hobbits excelled in the ways of the sea, so Isengar saw more of the world than many, and was un-Hobbitish in many ways. He was Bilbo's uncle and Frodo's grand-uncle.