I think the name Margarine is a fine one for a cat. You can call her Marge for short, but that may be too close to Midge…
And who is a little chubstress!? You are, yes you are!
I’m just here to suggest “Poops” before bbs2k gets here.
Our current cat is named “Mouse” (never let a 5-year-old name a cat). My favorite cat from days gone by was named “You Fat Sonofabitch” (never let a drunken/stoned college roommate name a cat).
I’ve always been a nut for ‘people’ names on cats. Some of the felines I’ve known; Gloria Belle, Marty, Rudy (short for Rudyard) and Sass.
Skeelers is a cool name for a cat.
Pliny the Elder is also cool. So long as you pronounce it as rhyming with tiny. (Yes I know Mr Elder didn’t say it like that)
The best way if you want to reject two COOL names 
is this:
Find out the cats best characteristic, like copper or speckles. Then start looking through foreign languages that aren’t popular (like Estonian or Breton) and find out what word means Copper or Speckles in that language. Then pic the coolest sounding ones.
I feel the same way about Hortense.
I called one of my old cats Mao, which was short for Mousey Tongue 
(his real name was Urses, Mao was my personal nickname for him)
ETA: might be a bit confusing just to read it, but think 20th century China…
OMG! I GET THAT!*
*from the Tribal Love-Rock Musical HAIR
Sundance or Sundancer
Sprinkle
Catastrophy
Or Trophe for short