Jötunn
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A jötunn is a type of being in Germanic mythology. In Norse mythology, they are often contrasted with gods and other non-human figures, such as dwarfs and elves, although the groupings are not always mutually exclusive. The entities included in jötunn are referred to by several other terms, including risi, þurs and troll if male and gýgr or tröllkona if female. The jötnar typically dwell across boundaries from the gods and humans in lands such as Jötunheimr.
The Gotlandic image stone Stora Hammars III is believed to depict Odin in the form of an eagle (note the eagle's beard), Gunnlöð holding the mead of poetry, and Suttungr.
The Yetnasteen - a standing stone in Rousay in Orkney, held in local folklore to be a giant or jötunn that has been turned to stone.
Troll
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A troll is a being in Nordic folklore, including Norse mythology. In Old Norse sources, beings described as trolls dwell in isolated areas of rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings.
Look at them, troll mother said. Look at my sons! You won't find more beautiful trolls on this side of the moon. (1915) by John Bauer
Skogtroll (Forest Troll), by Theodor Kittelsen, 1906
The Princess and the Trolls –The Changeling, by John Bauer, 1913