Thor was believed to be the son of Odin (Wotan or Woden) and the giantess Jörd (Jord, the Earth). His wife is called Sif. With his mistress, the giantess Járnsaxa, Thor had his sons Magni and Modi, and with Sif he had his daughter Thrud. Thor also had a stepson called Ull who was a son of Sif.
According to writings known as sagas, Thor owned a short-handled war hammer, Mjolnir. When the hammer was thrown, it returned magically to the owner. The strike of the hammer caused thunderclaps. With the hammer, Thor performed his giant-killing duties.In English, Thursday is named after Thor.
Thor is the god of thunder, but he is also a member of the Avengers. Loki is his supposed younger brother. Sif is not his wife, but his friend.