A singular Latin noun meaning heir or successor in legal and formal contexts.
From Latin haeres (heir), from PIE *ghe- (to grasp). Used throughout Roman law and inherited into medieval European legal systems.
The concept of a 'haeres' in Roman law was incredibly detailed—they had to determine if you were a direct heir, a 'haeres necessarius' (forced heir), or something else, and this created the entire foundation of property law.
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