My understanding of the "rules" for indexing names is to type what is written. That means that "Geo" is Geo NOT George. And "Wm" is Wm NOT William. As an arbitrator, I really don't like to have the percentage of accuracy go down for the indexer who spelled out the name completely, but it happens.
Now, if the rules have changed since I began indexing, someone needs to clarify it for all of us. But for now, I will reluctantly make the decision that what is written is what I am supposed to index or choose during arbitration even though I know that both spellings clearly identify the same person.
I hope this hint helps all of you great indexers improve your accuracy percent. Remember, the more accurate we all are, the quicker the indexing will be done. Then we can all enjoy the results of our efforts.