Are there kings in the ST multiverse?
, only various kings from history and lore have been referenced, like Macbeth, Henry V, Arthur, Hrothgar, etc. However, then-Prince Abdullah, who's now the King of Jordan, appeared as a Voyager
crewmember in "Investigations."
In Trek Lit, there's King Stevvin of Shad in Howard Weinstein's classic The Covenant of the Crown
. Since you mention the multiverse, Star Trek Online
gives the Gorn a king.
Of course, there are queens in Trek; even if we discount the Borg "Queen" (since it's a figurative title), there's Deela, Queen of Scalos; Queen Arachnia from Captain Proton
; and the Queen of Hearts from TAS: "Once Upon a Planet." Oh, and Stevvin's daughter Kailyn in Covenant
, the future queen of her world.