Relatives

Throughout the Transformers multiverse are many Transformers who consider themselves family and refer to each other as such. The most common case is when two Transformers regard each other as siblings. Transformers even occasionally express familial relationships with non-Transformers.

Given that Transformers are not organic life and likely do not reproduce sexually, the origin, distinction, and exact meaning of many of these terms is frequently unclear.

Possible explanations
The Dreamwave More Than Meets The Eye guide provides a partial possible answer. According to the guide, when a spark naturally splits as it's being introduced to a protoform, it creates two robots who are "brothers," such as Sideswipe and Sunstreaker. When such a spark division is artificially induced, the less balanced and self-reliant pair created are referred to as "clones". (This definition of "brother" may or may not apply to Optimus Prime and Ultra Magnus, whose brotherhood was said to result from the special circumstance of having both been re-created by Alpha Trion).

Notable siblings

 * ''See also: Twin

Generation 1

 * Sideswipe and Sunstreaker


 * Fastlane and Cloudraker
 * Frenzy and Rumble
 * Topspin and Twin Twist
 * Pounce and Wingspan
 * Optimus Prime and Ultra Magnus

Shattered Glass

 * Jazz and Ricochet
 * Sideswipe and Sunstreaker
 * Rumble and Rumble

Parents and children

 * Creators as parents
 * Alpha Trion is ("more than almost like a") father to Optimus Prime and Elita One in the cartoon continuity, and to Dust Devil and Tonka on the MUX as well.

Shattered Glass

 * Crasher and Blurr