Last name Gwy (Gwy 
) , in all the world, is an extremely rare surname. The last name Gwy is characteristic of Thailand, where it is an extremely rare surname, and the United States. More frequently, Gwy is the forename as well as the last name.
| gwilym ab ieuan ap caradog ab ynyr ab ifor of gwy |
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| maredudd ab einion llwyd ap madog sais ap llywelyn y moelwyn of rhaeadr gwy |
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