Thetis is a goddess with the letter T. She comes from Greek mythology. She was one of the nereids, or sea nymphs, of beautiful beauty. Thetis' father was Nereus and her mother was Doris. She married Peleus, with whom she had a child named Achilles. She tried to make her son immortal. She left her husband and left with the child.
Thanatos is a mythological god with the letter T. Described as the disposition of death. One of his attributes was black wings coming from his shoulders. He is believed to have had a twin brother named Hypnos. The Roman equivalent of Thanatos was the goddess Mors. His mother was Nyx.
Theseus is one of the heroes with the letter T. He appears in Greek mythology. His father is considered to be Aegeus, and his mother Aitra. His transition into adulthood began with the moment he lifted a boulder, under which he had hidden sandals and a sword. He was a participant in the war with the Amazons.
Tartarus is a land of the underworld beginning with the letter T. We can read it to others in Greek mythology. It was the darkest part of the underworld, where souls condemned to eternal suffering were found. Hades from Tartarus was believed to be as far from heaven to earth.