A large variety of suffixes were used to form diminutives in English. The Wikipedia page on diminutives shows these: * -k/-ock/-uck: balk, bollock, bullock, buttock, fetlock, folk, hark, hillock, ...
Origin of the “-y” or “-ie” diminutive suffix to denote intimacy/tenderness? (E.g. Bob→Bobby, dad→daddy, Doug→Dougie)
Many names seem to get a "-y" or "-ie" at the end when the speaker wishes to denote a hint of familiarity, intimacy, or tenderness. Examples can be seen not just in names, but in terms like puppy, ...