Bob's your uncle. Heavens to Betsy. For Pete's sake. What other given names are used in common expressions, for no apparent reason?

 

  Does Pandora’s Box truly fit the category?  It’s not unknown as to why the name is used. 

You accepted Rufus Leaking.

 

  I didn’t “accept” it; I merely didn’t mention it at all.  I’ve never heard it before, nor heard of it before, so I left it alone. As far as it’s supposed to be a humorous take on “the roof is leaking”, well, I hope the day job is still viable. 

:|

Uncle Tom is from the book 'Uncle Tom's Cabin'.

I know, but it meets the requirement for the question.

In my opinion, it is not used for 'no apparent reason'. It is used to describe a person who acts like the title character.

 

  She’s correct. 

~

Uncle Tom, Pandora, Rufus and Kilroy don't count.
Uncle Tom and Pandora have known reasons, Rufus is a pun (noted and appreciated) and Kilroy is not a given name but a surname - America's WW2 answer to the Australian "FOO was here" from WW1. FOO popped up at just about every single AIF camp or outpost - may have been referencing "Foward Observation Officer" but this is uncertain. This post was edited by Slartibartfast at September 10, 2020 8:32 PM MDT

Fun kill alert.

 

  Oh, I certainly hope so!

~

Did anybody other than Snagglepuss use "Mergatroid"?

I have no idea. Messages seeking comment were not immediately returned.

LOL

Aristocratic English surname from Yorkshire circa 1731 apparently