Thread: Help with Diminutives?

Originally Posted by shadycat16

Mostly I'm interested in how her uncle, aunt, or grandmother would use for them.

Света,Юра,Коля/Sveta,Yura,Kolya are "base level" for family usage.
Светка,Юрка,Колька/Svetka,Yurka,Kol'ka are just a little more familiar and should be used more in your setting.
Other forms are generally rare and used in exceptional conditions (tenderness, persiflage, anger).