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Alanus IV (dux Britanniae)
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Alanus IV Ferganus[1] sive Alannus Fergannus (ex orthographia antiqua)[2] Castrolini natus circa annum 1060, obitus die 13 Octobris 1119 abbatia Rothonensis, fuit comes Cornubiae, Redonis atque Namnetis et de anno 1072 ad annum 1112 dux Britanniae.
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