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Re:Elephants give each other names – first non-human animals... by DoreenMichele on Thursday November 16, 2023 @02:46AM (#38286775)
Pretty sure we've been saying for years that dolphins name each other.

First link I came up with on a really quick search, dated 2013:

https://www.smithsonianmag.com/smart-news/dolphins-may-have-...

Re:Elephants give each other names – first non-human animals... by morteify on Thursday November 16, 2023 @05:44AM (#38287963)
There is a mention of dolphins in the article: "This makes them [elephants] the first non-human animals to address each other in a manner that does not imitate the receiver's own call, as dolphins and parrots do."