They do not seem quirks ... all these names allude to the goal of the class, and these goals are different. With programming, all this is in the name, and they should be chosen very carefully. The variety should not be avoided. Names are different because the goals of these classes are different.
MyClassUtil
- MyClass, . , MyClass , , , - .
MyClassFactory
- MyClass . , MyClass. MyClassFactory. Factory , MyClass. , Factory /mock MyClasses. , , Factory, , factory voilà, .
MyClassHelper
-, , , . - MyClass, . , MyClassUtil. , , MyClassUtil - , MyClass, MyClass, . MyClass .
MyClassManager
- MyClass . . CommunicationManager , , ethernet serial, , comms, , , .
MyClassService
- - , , , . . , - .