There was a thread back in August 2014 about weapon names - when the reveal was fresh.
I called dibs on "Knock Knock" - a Warhammer I have yet to craft due to not making my planned 2H Elf (I'll drink to all the hate I'll hear about 2H and Elven ladies going together).
Then, being a proud Dalish, I have also suggested to name a bow the "Recurve of the Woods"
My two favorite daggers are "The Bard's Letter Opener" and "Tool of the Game" - my canon Inky had some interest in the Bardic skills, but mostly because of stealth. She took up Tempestiness in the end.
There were some really good names in that thread. I'm proud of the ones I came up with.
As for other names, I try to come up with sensible names - "Inquisitive Seeker" - "Darkspawn Eliminator" - "Dragon-Slayer's Padded Mail" - "Chill Pill"...
I'm the last person to ask for weapon names.
I have McStabbity, Prod, Poke, DragonTickler, Thwack
etc...
Vengeance and Hope were likely my only sanely named weapons and both were mage staffs.
Inb4 Ash gets called "Princess Stabbity" because of that dagger.