Æthelbald (also Ethelbald or Aethelbald) may refer to:
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Æthelbald of Mercia, King of Mercia, 716–757
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Æthelbald, King of Wessex, 856–860
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Æthelbald of York, Archbishop of York, 900–904
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Æthelbald (bishop), bishop of Sherborne (died between 918 and 925)
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