Transformers Reference (Canon): Relatives and Relationships

RELATIVES

Generation One

Parents -- Children 

   Dai Atlas -- Speeder

   Sixshot -- Quickswitch

Siblings

   Aquafend and Jetstorm (Wings Universe)

   Blaster and Bluster (IDW)

   Blaster, Karmen, and Toaster (Marvel)

   Blip and Blot (IDW)

   Cloudraker and Fastlane

   Darkwing and Dreadwind (IDW)

   Dominus Ambus and Minimus Ambus (IDW) 

   Fortress Maximus and Grand Maximus

   Leozack and Lyzack

   Needlenose and Tracks (IDW)

   Optimus Prime and Ultra Magnus (Dreamwave)

   Pounce and Wingspan

   Primus and Unicron
   Rack, Ruin, and unidentified (IDW)

   Rumbler and Sprocket (Wings Universe)
   Sceptre and Sunder (IDW)

   Shockwave and Sixshot (Ask Vector Prime)

   Shockwave and Soundwave (Transformers vs. G.I. Joe)

   Sideswipe and Sunstreaker  

   Skyburst and Stormclash (IDW) 

   Skywarp, Starscream, and Thundercracker (IDW)

   Springarm, Wheelarch, and Valve (IDW)

   Starscream and Sunstorm (Dreamwave)

   Topspin and Twin Twist

Beast Era

Parents -- Children

   Lio Convoy -- Lio Junior 

   Ravage -- Jaguar 

   Waspinator -- Buzz Saw and Venin

Siblings

   Buzz Saw and Venin 

   Dinobot II and Rampage (considered half-brothers by Megatron) 

   Galvatron and Megastorm 

Cousins 

   Ikard and Scuba

RID

Siblings

   Dark Scream, Gas Skunk, and Slapper (Car Robots)

   Optimus Prime and Ultra Magnus

   Prowl, Side Burn, and X-Brawn

Unknown relation

   Artifre and Fire Convoy 

Unicron Trilogy

Siblings

   Dauntless Maximus and Superion Maximus (Energon) 

   Failsafe and Flashbang (Armada)

   Hardtop and Swindle (Cybertron)

   Inferno and Rodimus (Energon toy bios)

   Jetfire and Overcast (Energon)

   Landmine and Landquake (Energon)

   Offshoot and Signal Flare (Energon)

   Optimus Prime and Ultra Magnus

   Repugnus and Undermine (Cybertron)

   Shockblast and Six Shot (Energon)

Cousins 

   Brushguard and Overhaul (Cybertron)

   Bulkhead and Quickstrike (Energon)

   Skywarp and Starscream

   Swindle and Zapmaster (Armada)

Movies

Siblings

   Arcee, Chromia, and Elita-One

   Megatron and Optimus Prime (possibly; could be metaphorical) 

   Mudflap and Skids

   Trample and Tread

Cousins

Animated

Siblings

   Huffer and Pipes

   Jetfire and Jetstorm  

   Mixmaster and Scrapper

Aligned

Siblings

   Dreadwing and Skyquake

RELATIONSHIPS

Note: Some of these relationships are mainly hinted at and never realized or shown fully.

Generation One

Male-female

   Bumblebee + Arcee (G.I. Joe vs. the Transformers)

   Chromedome + Arcee (The Headmasters)

   Deathsaurus + Esmeral (Victory) 

   Holi + Clipper (Victory)

   Hot Rod + Arcee (The Headmasters)

   Inferno + Firestar (G1 cartoon)

   Ironhide + Chromia (G1 cartoon)

   Optimus Prime + Elita One

   Powerglide + Moonracer (G1 cartoon)
   Side Burn + Nightracer (Wings Universe)

   Sparkstalker + Lightbright (IDW)

   Springer + Arcee (The Headmasters)

   Swindle + Thunderblast (Wings Universe)

   Wreck-Gar + Nancy (G1 cartoon)

Male-male
   Blast Off + Onslaught (IDW)

   Brainstorm + Quark (IDW) [one-sided]
   Chromedome + Rewind (IDW)
   Chromedome + Mach (IDW)

   Chromedome + Pivot (IDW)

   Chromedome + Scattergun (IDW)
   Chromedome + Prowl (IDW) [implied]
   Cylonus + Tailgate (IDW)
   Dominus Ambus + Rewind (IDW)
   Drift + Ratchet (IDW)
   Horri-Bull + Needlenose (IDW)

   Knock Out + Breakdown (IDW)
   Megatron + Kiloton (G2; Ask Vector Prime) [implied]

Female-female 

   Acceleron + Proxima (IDW)
   Anode + Lug (IDW)
   Arcee + Aileron (IDW)
   Dust Up + Jumpstream (IDW)
   Greenlight + Lancer (IDW)
Interspecies
   Bumblebee + Scarlett (Transformers/G.I. Joe)
   Crankcase + CONS4EVA (IDW)
   Jazz + Marissa Faireborn (Dreamwave)
   Powerglide + Astoria Carlton-Ritz (Cartoon)
   Rodimus Prime + Michelle (Cartoon) [heavily implied, at least]
   Seaspray + Alana (Cartoon)
   Skids + Charlene (Marvel)

Beast Era

Male-female
   Obsidian + Strika

   Rattrap + Botanica

   Silverbolt + Blackarachnia

   Tigatron + Airazor

Male-male
   Bazooka + Crazybolt (Uprising)

   Tigatron + Airazor (Japanese Beast Wars) [they changed Airazor's gender in the dub for... reasons]
Interspecies
   Tigatron + Snowstalker 

RID

Unicron Trilogy

Male-female

   Vector Prime + Scorpia (Ask Vector Prime)

Male-male 

   Mirage + Megatron/Galvatron (Energon) [one-sided; toned down in the English dub]

Interspecies 

   Starscream + Alexis (Armada) [Your mileage may vary on this one]

Movies

Animated

Male-female

   Lugnut + Strika 

   Optimus Prime + Elita-1/Blackarachnia

   Rattletrap + Botanica  

   Sentinel Prime + Elita-1

   Volks + Glyph

   Warpath + Flareup

Aligned

Male-female

   Breakdown + Airachnid [hinted at; then she killed him]

Other

Female-female

   Strongarm + Windblade (Shattered Glass)