Underfelow or Underfellow: How To spell?

The word Underfelow is misspelled against Underfellow, a noun meaning "An underling // mean, low fellow."

Underfellow has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings underfe & ow which should not be misspelled with single 'L'
Wrong Spelling:  underfe-l-ow 
Correct Spelling:  underfe-ll-ow 
Find more incorrect spellings of Underfellow to spell right way.