Weapon Name Puzzle
Which weapon was named after a fruit?
Which two weapons' names come from Czech?
Which weapon was named after a Norse woman's name?
Which two weapons share the same name, though they are about as different as weapons can be? [UPDATE: Some of the commenters were discussing various weapons systems that fit this, and I appreciate their points; but I'd like to limit this question to personal weapons, of the sort that one person would carry.]
None of these, except for one of the two weapons from the last question, is a brand name.