Someone who gives warnings or alerts others to danger or problems. Also a surname, and famously associated with Warner Bros. entertainment company.
From Old English 'wearnian' meaning 'to warn, give notice of danger.' The occupational surname developed for people whose job was to give warnings, such as town criers or military sentries.
The surname Warner reflects how crucial early warning systems were in medieval communities - someone's entire identity could be built around their role as the community's alert system. Before mass communication, the warner was literally a lifeline, making the difference between survival and disaster for entire villages.
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