Niobe

In the Matrix franchise, Niobe was the captain of the Logos and Logos II. At one time she and Morpheus were a couple. She then dated Jason Lock, but she was still in love with Morpheus. She was the best pilot in the Resistance.

In Hercules: The Legendary Journeys, Niobe was a princess. When Iolaus posed as King Orestes, she married him without knowing his true identity. They two fell in love, and she remained married to him after she learned the truth.

71 Niobe is a main belt asteroid. It was discovered in 1861 by German astronomer Robert Luther.

Niobe is a Greek name that means 'fern'. In Greek mythology, Niobe was a queen of Thebes. After her children were killed by Apollo, she wept so much that she turned into a stone from which water constantly flowed. In 2014, 6 girls were given the name in the United States.

Theseus

In the film Fantastic Beasts and Where to Find Them, Theseus Scamander was the brother of Newt Scamander. He is only mentioned in the film, as he was a famous war hero in World War I.

In the Canadian television show Continuum, Theseus is the alias of Liber8 leader Julian Randol. Along with his father, Julian has an anti-corporate agenda, believing that corporations are controlling our governments. Kiera, the protector from the future, has knowledge of horrific crimes committed by Theseus. When she learns of his true identity, she is faced with a Hitler murder paradox. In the end, she lets Julian live, but fears she may have helped create the monster he is to become.

In the Hercules: The Legendary Journeys, Theseus was a boy who was sent by his mentor, Ceridian, secure Hercules aid in stopping another student, Cassius, who was about to begin a war.

EAS Theseus was a Omega-class destroyer in Babylon 5.

The Theseus Morpho is a type of butterfly.

In Greek Mythology, Theseus killed the Minotaur in a labyrinth, using a ball of string given to him by King Minos' daughter to find his way out. In Doctor Who, the Fourth Doctor claimed that he had been the one to give the string to Theseus.

In 2012, 41 boys were given the name Theseus.

Callisto

Callisto is one of Jupiter's moons that was discovered by Galileo. It is Jupiter's second largest moon, and is nearly as large as the planet Mercury. It is composed of equal amounts of rock and ices.

In X-Men, Callisto was a mutant who possessed superhuman senses of sight, hearing, smell, taste, and touch. She was once a beautiful woman, but became scarred as a result of violent encounters with normal humans. She was the leader of the Morlocks, a group of mutants that lived in the sewers. She lost leadership of the Morlocks when Storm defeated her in a duel.  She later became a servant of the wizard Kulan Gath. When she found herself in a new timeline, she became an ally of the X-Men and even rescued Professor X. 

Callisto was a character in Xena: Warrior Princess and in Hercules: The Legendary Journeys. Callisto witnessed the death of her mother and sister at the hands of Xena, who killed them during a chaotic attack on her village. As a result of this trauma, Callisto became a ruthless and bloody warlord, who was out to get Xena. She died twice, became an immortal, then a God, then a demon, and ultimately an archdemon. 

The Callisto series was a series of science fiction novels published in the 1970s by author Lin Carter.

In Doctor Who, the Callisto Pulse was a device that could disarm micro-explosives. River Song traded a Callisto Pulse for a vortex manipulator she needed to reach the Doctor.

In Star Trek, the U.S.S. Callisto was a Federation starship, and in a Star Wars novel, Callisto was the name of an Imperial Star Destroyer.

In Greek mythology, Callisto was a nymph of Artemis. She was transformed into a bear and set among the stars. Callisto has never ranked in the top 1,000 names in the United States. In 2012, 7 girls were named Callisto in the U.S.