I am looking for sources that show the historical use of the spelling
of Gwylym.  I've seen it once but cannot for the life of me find it
again.

Diolch!

Hwyl Fawr

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Let sleeping dragons lie........                    | The RoleMancer
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William Wilson (wew@naucse.cse.nau.edu | wilson@nauvax)
Northern AZ Univ  Flagstaff, AZ 86011