I usually do a letter then a number and another letter, eg. 'i1 A' , 'i1 B+' , 'i4 B'. Then after that I would do the number of pins and the clock speed so a full one could look like this: 'i1 A 14-106'
+If its in a DIP then I usually put DIP after the pin number, if its PLCC then etc etc etc