1815, in the meaning defined at sense 1
Why does Eeyore have the name he does?
Donkeys don't say 'eeyore'—or do they?
“Hee-haw.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hee-haw. Accessed 1 Oct. 2023.
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