All over the world, Cadwgan (Cadwgan 
) is an extremely rare male forename. More frequently, Cadwgan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Cadwgan | Canada, United States, United Kingdom, Australia |
| griffith cadwgan Peerage person ID=197841 |
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| cadwallon ap madog ab idnerth ap cadwgan - 22 Sep 1179 (murdered) |
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| awst ap cadwgan |
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| cynwrig fychan ap cynwrig ab ithel llwyd ap cadwgan |
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| gruffudd ap hywel gam ab ieuan ap cadwgan, lord of llanvyrnach |
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