"Blessed is our father David's coming kingdom." This refers to Jesus coming and ruling as king. The word "blessed" can be translated as an active verb. Alternate translation: "Blessed be the coming of your kingdom" or "May God bless you as you rule your coming kingdom" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-activepassive]])
Here David's descendant who will rule is referred to as David himself. Alternate translation: "of the greatest descendant of our father David" or "that David's greatest descendant will rule" (See: [[rc://en/ta/man/translate/figs-metonymy]])