Focus on Juniper (given name) and explore the Common nicknames of Juniper.
Pepper or other diminutives based on the last syllable
June or other diminutives based on the initial syllable
Ginny: The name for the spirit gin is an English derivation of the Dutch word for Juniper: genever. This nickname is either in reference to gin, or similarly, when something is said to taste like juniper berries, it is said to be "ginny" tasting.
Jenny: More so in England, where in some places it is pronounced "jenny-per"
Nip or Nipper: While the origin of the usage of "nip" to refer to a drink or a glass of an alcoholic beverage actually comes from the rare term nipperkin [small measure], a folk etymology has that it originally referred to a nip of gin, with the "nip" being a shortening of juniper.
gin diminutive Gin nipperkin