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Yale (surname)

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The surname Yale is derived from the Welsh word "iâl", meaning "fertile ground". Iâl was the name of an important commote in Denbighshire, whose rulers, the princes of Powys Fadog, lords of Yale, were a cadet line of the royal House of Powys. For hundreds of years, their ancestral seat was at Castle Dinas Bran in Yale. Afterwards, baron Ellis ap Griffith attached the name to the estate of Plas-yn-Iâl, from which the House of Yale (or Yale family) became known.