Yep...and I think Bilbo uses it to address Smaug...though ithere is the story of the child being taught the vocative of table in latin was for addressing a table ..O table!. He protested he never did...
The rest are far less obscure..
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“But Finrod walks with Finarfin his father beneath the trees in Eldamar.”
Christopher Tolkien, Requiescat in pace
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