Zalezna was a planet governed by a king.
King Loran of Zalezna was killed by Kalem, who was attempting to seize power. Kalem was stopped by the Eighth Doctor, who used his sonic screwdriver to disarm Kalem's soldiers. Mihal was then made king of Zalezna. (PROSE: From Little Acorns)
Mihal later died and his children took over from him. (PROSE: Epilogue)