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Yes, his older brother (Fred) did pass in his early 40s probably due to too much drinking, at least according to this:
https://en.wikipedia.org/wiki/Fred_Trump_Jr.

I think Robert is Donald's younger brother. He passed a few years ago, not sure if he was a drinker or an abstainer. The wikipedia article doesn't say. Unless I missed it, read it quickly.
https://en.wikipedia.org/wiki/Robert_Trump

Thanks for dropping by and commenting! :)

That’s right! Sorry was going by memory. Robert was his other brother who passed away during Covid. Yes Fred Jr was the one who passed from his addictions. It seems to have affected Donald very much.