A possible nickname referring to the original name of Evie or Evelyn. Nickname is most likely to be used by someone close to or someone who used to be close to this person.
Most likely said by the person that loves them the most
Person 1: awwww Eviekins what's wrong
Evie: errrr I met you yesterday? who are you again? I have to go......
Person 2: do you fancy waffles Eviekins?
Evie: Yay! waffles, thankyou honey *kisses partner affectionately before rushing off to work*