Gonna have my geek fall out but hey who on Danbooru isn't one, but in TOS they mostly used the D7, the K'tinga showed up in TMP-DS9.
gonna have to get used to them refering to klingon cruisers as "Warbirds" but then again i'm sure people who saw "Balance of Terror" had to get used to Klingon Corvette/gunships being called "Birds of Prey"
just another ship type name the Klingons took from the Romulans o_O