Why doesn't the second part of this loop work?

The user should insert a name as an input and then confirm with a yes or no (or any of its derivatives) if the 3 worded name includes a middle name or not. So far, I've gotten the loop to work if the answer is yes; however it keeps looping the question if the answer is no.

The purpose: if the answer is yes, the program will understand its a 3 worded name with a middle name and therefore execute naming combinations with the middle name; if its no, the program will understand its a 3 worded name with a second last name instead of a middle name and therefore execute naming combinations accordingly.

Please note I have exluded a lot of the code for sharing purposes.

What I'm I doing wrong? My question is in regards to the elif part of the loop.

print ('enter name')
providedname = input ()
while providedname != 'quit':
  if len(providedname.split())==4:
    pass

  elif len(providedname.split())==3:
    print ('Does the name include a middle name or middle initial? Please type yes or no:)
    userinput = input()

    if userinput.startswith ('ye' or 'Ye' or 'YE' or 'ya' or 'Ya' or 'YA'):

    elif userinput.startswith ('no' or 'No' or 'NO' or 'na' or 'Na' or 'NA'):

    else:
      pass

  print ('enter name or type quit or q to exit')
  providedname=input()
  continue