A person who has; someone who possesses or owns property (Scottish and Northern English dialect).
From 'have' plus '-ier' suffix, Scottish dialectal variant of 'haver.' Appears in older texts referring to persons of property or substance.
In medieval Scottish tax records, they'd identify people as 'haviers' based on what they owned—it wasn't about who you were, but what you had, which says something about how property-based medieval society really was.
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