This usually isn't an issue unless the name supplied is something like "Ginny", in which case I'd search for "Jenny" and maybe "Virginia" or even "Genevieve".  Sometimes in a computer search, less is more, for example, entering the first two or three letters, like "Gin" or "Gen" or something similar.

Since I started running oil and gas titles, I've run into a lot of variations of last names in deeds recorded in the 19th and early 20th century.  Just the other day I found a guy's last name spelled three different ways, "Morrow", "Mauro" and "Moreau" in the same chain of title.  Fortunately, the Russell Index System used in the old books takes that into account and it's easier to catch such variations.  In many ways, I think the old search methodologies are superior to modern computer indexing systems.

Regards,
Scott Perry