Why do people, when unsure of pronunciation of a word and/or name do they decide to attempt and fail to pronounce it a number of times?
They don't know how to pronounce the last name of the person they are looking to speak with so they just change the vowels sounds randomly or make a random letter silent.
Always fun. Always effective... An effective way to get me to put you through to some one's voice mail to make sure you don't speak with them immediately.
Hopefully you will listen to how they pronounce their last name in their greeting and remember it.