This has bugged me for a while.

Are the G1 iterations of Prowl, Bluestreak and Smokescreen literally relatives? Is this referred to in any official fiction?

Because I keep seeing people referring to them as brothers, particularly in relation to the upcoming Masterpieces. Even news postings on the international sites are calling them "The Datsun Brothers".

I'm assuming it's more of a "brothers in arms" thing rather than a family thing, because they share the same alt mode, the MPs were sort of announced together and are being released in succession of one another.

I know RID Prowl has two brothers, but I don't think that's really relevant here.