Sibling
In a family, a sibling was an offspring born from the same parent or parents as another offspring. () In the case of multiple births, more than one sibling (i.e. twin, triplet, or quadruplet) were born at one time. (, et al.) 

Trill symbionts had to move on from their previous hosts' lives, even forgetting any siblings the host may have had. ()

In 2153, Doctor Phlox asked T'Pol if she had any siblings. This was done as a prelude to soliciting her help with Trip Tucker, who was grieving the loss of his sister Elizabeth in the Xindi incident. ()

Haliz recruited Kazon to be fighters as soon as they were old enough to protect their younger siblings. ()

As of 2374, the crew of  knew little about Annika Hansen, such as whether she had any siblings. ()

Siblings

Brother 
The male sibling was known as the brother. (, et al.) In the Ferengi language, the term was translated as "yoba". ()

A child who has a brother shared through one parent was known as a half-brother. Spock and Sybok were half-brothers; both were sons of Sarek, but both had different mothers. ()

Sister 
The female sibling was known as the sister. (, et al.) A sister who was not biologically related but rather by marriage was known as a stepsister. (; ) Ships that were similar to each other were, in keeping with the tradition of referring to a ship as a "she", known as sister ships.

Examples

List of full siblings 
 List of full siblings:
 Arcana, Dahj Asha, Soji Asha, Beautiful Flower, Codex, Jana, Rune, Saga, Sutra, and various others
 Ezri Dax, Janel Tigan, and Norvo Tigan
 Demmas and Ameron
 Duras, Lursa, and B'Etor
 Kahless and Morath
 Karden and Kinell
 Kathryn Janeway and her sister
 Kira Nerys, Kira Reon, and Kira Pohl
 George Samuel and James T. Kirk
 Geordi and Ariana La Forge
 Travis Mayweather, Paul Mayweather, and their sister
 Meribor and 
 Narek, Narissa, and their brother
 Neelix and Alixia
 Manu and La'an Noonien-Singh
 Molly and Kirayoshi O'Brien
 Obrist and his brother
 Robert and Jean-Luc Picard
 Jake and Willie Potts
 Quark and Rom
 Devinoni Ral and his four siblings
 Malcolm and Madeline Reed
 Connor Rossa and his brother
 Saru and Siranna
 Seska and her brother
 Judith Sisko and her two brothers
 Simon Tarses and his brother
 Kestra and Deanna Troi
 Lwaxana Troi and her sister
 Thaddeus and Kestra Troi-Riker
 Charles and Elizabeth Tucker
 Vel and Piri
 Worf and Kurn
 Natasha and Ishara Yar
 Yranac and his sister
 Zeus and Hera

 List of multiple birth siblings 
 List of multiple birth siblings:
 Ah-Kel and Ro-Kel
 Apollo and Artemis
 Arcana and Saga
 Dahj and Soji Asha
 Azan and Rebi
 Codex and Rune
 Jenny and Megan Delaney
 Gorn octuplets
 Jana and Sutra

 List of half-siblings 
 List of half-siblings:
 Aphrodite, Apollo, Artemis, Athena, Hermes, and Hephaestus
 Benjamin Sisko, half-brother of Judith Sisko and her two brothers
 Jake Sisko, half-brother of Benjamin Sisko's unborn (as of 2375) child
 Spock and Sybok, half-brothers
 Tora Ziyal
 Half-sister of Mekor
 Half-sister of six unnamed children fathered by Dukat and his wife
 Half-sister of the infant fathered by Dukat and Mika
 Ian Troi, half-brother of Thaddeus and Kestra Troi-Riker
 Kestra and Deanna Troi, half-sisters of Lwaxana Troi's unborn (as of 2372) son

 List of fictional siblings 
 List of fictional siblings:
 Blaine and  ()
 Beatrice Burleigh and Henry Burleigh ()
 Piotr Chekov, the fictional brother of the very real Pavel Chekov ()
  and her brother ()
 One of Three, Two of Three, and their unnamed sibling ()
 Seb-Cheneb and Seb-Natan ()
 Tweedledum and Tweedledee ()
 The Twin Mistresses of Evil ()
 The Unnamed fictional brother of the very real Jonathan Archer ()

External link 
 
Family