Mr. Spock's half-brother Sybok is emotional and basically crazy. He doesn't follow the Vulcan's way of logic so does that mean he's a Romulan?

  • 1
    No... Spock and Sybok share the same father, but I believe Sybok's mother was Vulcan... (can't find a reference though so I might well be imagining it) Commented Dec 17, 2017 at 15:08
  • 6
    No. He's an emotional Vulcan
    – Valorum
    Commented Dec 17, 2017 at 16:04
  • 13
    I'm a Canadian who doesn't like Hockey. Does that make me American? Commented Dec 17, 2017 at 17:14
  • 9
    The problem with citing references here is that doing so would necessitate rewatching Star Trek 5. You really want to do that to people? Commented Dec 17, 2017 at 17:45
  • 2
    @EmsleyWyatt What does God need with a rewatch? Commented Dec 17, 2017 at 18:40

2 Answers 2


No, Sybok was Vulcan.

Sybok was the son of Sarek and an unnamed Vulcan princess. He is biologically %100 Vulcan.

Sybok did not want to follow the teachings of Surak. This is indeed what the caused the Romulans to split from the Vulcans in the first place, but Vulcans and Romulans are physically different as well, as detailed in the linked answer.

So while Sybok may emotionally have been more Romulan than Vulcan, there is a biological difference between the two species, and Sybok is a Vulcan.


Sybok was a vulcan

He was technically a Vulcan, no denial but you could say he acted like a Romulan, or rather he acted like Those That March Under The Raptors's Wings (ancestors of the Romulans that defied Surak) but Romulans stopped being Vulcans a long time ago when they started evolving and breeding so that they got their V shaped foreheads.

  • isn't it raptors wings?
    – Ummdustry
    Commented Aug 13, 2018 at 15:33
  • Oh right sorry will edit it
    – Zolen
    Commented Aug 13, 2018 at 20:56

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