Welsh Names - a great long list from Gaelicnet.org. Very interesting, though it lacks meanings or pronunciation. Sources include a collection of late-16th century toll records and summaries of legal procedings from Chancery records. Women's Names in the First Half of 16th Century Wales - yet another excellent page from Tangwystyl verch Morgant Glasvyrn. This one includes names from a list of chancery proceedings involving Wales.
More information is, as always, available on the page itself.
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