I think that etymology is just a coincidence.
In the Philippines, diminutives are common and usually formed with the suffixes
-ng,
-ay and
-oy.
For instance:
Paula,
Paulina -> Poleng
Guillermo -> Emong
Aurora -> Auring
Jose -> Josing
Josefa (via Pepa) -> Pepay
Butch -> Butchoy
I think Goring comes from
Gregorio, as Spanish names aren't rare in the country.
Gregorio -> Gorio -> Goring
Compare Goyong, which comes from the same name but via
Goyo.
Lastly, you could check these lists of diminutives.
Ending in
-ing:
https://www.behindthename.com/submit/names/usage/filipino/end/ing
Ending in
-ng:
https://www.behindthename.com/submit/names/usage/filipino/end/ng
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