Nicki
[ˈnɪki]Meaning
a diminutive of Nicole
Background Story
Behind the Name records Nicki as a diminutive of Nicole. It is used in Basque, Bulgarian, Croatian, Czech, Danish, Dutch, French, German, Greek, Hungarian, Italian and Māori. Wiktionary derives it as a clipping with the diminutive suffix -i.
Temperament

Related Names
Ninie
A given name recorded in Gallo, used as a feminine name
Aggie
Diminutive of Agnes or Agatha
Allie
Diminutive of Alison, Alexandra and other names beginning with al-
Angie
Diminutive of Angela and other names beginning with Ang
Assie
A diminutive form of 'Aster' which means 'star' in Greek
Astie
Bessy
English diminutive formed from Bess with the suffix -y
Besty
Cadie
English given name used for girls and boys; Ido word formed from ca-, dio and -e
Carly
Feminine form of Carl