William and John are the most common given names in Brooks families, I've found. In my own database of about 75,000 names, I have 586 Brooks individuals with given or middle name John and 486 Brooks males with given or middle name William.
Additional detail, please. The most helpful information you could provide would be locational.
Is this Raymond (Lone Wolf) Brooks querying by any chance? If so, we corresponded back in the late 90s. I am Christopher Brooks, the Brooks Families of New England guy.