Handwriting analysis can be of use to Genealogists in 2 ways:
1. When there are letters and documents written many years ago, and the genealogist wants to know more about what type of person was the writer.
The handwriting gives a complete personality picture, so with a page or so of writing it is possible to get to know the personality of the writer very well indeed.
2. When there are old records and it is of interest to know if the same person made several different entries.
In this case analyzing the handwriting can tell how many different people made entries in the records.
With a reasonable extensive entry in records, it can even be possible to match up the writer of the record entry with the writer of a letter or other document.
Genealogy is often pursued as a hobby, and for those who do this, learning more about handwriting analysis can be a bonus.