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William McArthur invented the Splayd – an Australian invention
The Splayd is a multipurpose eating utensil that combines the functions of a spoon, fork, and knife into one tool.
It was invented by William McArthur in the 1940s in Sydney, Australia.
The design was inspired by the need for a practical solution for women who struggled to manage multiple utensils at social gatherings.
McArthur's wife, Suzanne, initially sold the Splayd at her café, and it gained popularity as a wedding gift in Australia during the 1950s and 1960s. By 1991, over 4.75 million Splayds had been sold worldwide, making it an iconic example of Australian product design.

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William McArthur invented the Splayd – an Australian invention
The Splayd is a multipurpose eating utensil that combines the functions of a spoon, fork, and knife into one tool.
It was invented by William McArthur in the 1940s in Sydney, Australia.
The design was inspired by the need for a practical solution for women who struggled to manage multiple utensils at social gatherings.
McArthur's wife, Suzanne, initially sold the Splayd at her café, and it gained popularity as a wedding gift in Australia during the 1950s and 1960s. By 1991, over 4.75 million Splayds had been sold worldwide, making it an iconic example of Australian product design.

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Over here we have what is called a "Spork", and while I have no idea how old the concept is, it may well be a simple spin-off from your Splayd.

Otherwise, back in the really old days, the trappers and mountain men used their skinning knives for every eating function, so there is that, and I suppose that the general concept of a singular utensil, goes way far back into antiquity!?!?