Byname definitions

bīnām
A surname.
noun
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A nickname.
noun
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(archaic, historical) A secondary name for a person or thing; a person's surname.
noun
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(archaic, historical) A nickname.
noun
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(UK dialectal, Scotland) A pseudonym; nom-de-plume.
noun
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(paganism) A ritual title for a god or goddess used in Heathenry.
noun
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(archaic) To assign a byname to.
verb
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Origin of byname

From Middle English, equivalent to by- +‎ name. Cognate with Dutch bijnaam (“nickname”), German Beiname (“nickname, epithet”).