This is just senseless hating IMO. What is wrong with KMail? KolourPaint? Konsole? Ktorrent? KSudoku? These are all straight forward and descriptive. Nobody bats an eye at "Gmail" but KMail makes people lose their shit apparently. Come on.

And of those that aren't plain and descriptive, most of them seem inoffensive. What makes Kate such a worse name for a text editor than "Vim", or "JOE"? What's so awful about a PDF reader called "Okular", when the competition is named named after southwestern construction materials and trapeze artists e.g Adobe Acrobat? At least 'Okular' suggests the program is for viewing something. Corporate brand can be as bizarre as the strangest KDE names, the only difference is what you're acclimatized to.