Below is a link to the Gwilliam surname message board at Ancestry.com I go to this site quite frequently.
Gwilliam Geneology site
On this page will be a collation of the surname Gwilliam. As many of you are aware, there are a few variances of the spelling, we have:- Gwilliam, Gwillam, Gwillym, Gwylim and probably a few more that I have yet to know about.
There will be Births, Marriages and Deaths and Dates and will be put in order of, County, town and if available the actual address.