For years and years, really decades and decades, there was an accomplished player in the Northwest region of the US known as Ivars Dalbergs. But then, as now, they sometimes got his name wrong:
This is the cover of the Sept 1958 Washington Chess Letter monthly. The caption for the cover reads:
So, the man standing in the center is our person, called Ivars Dalberg (sans final s) then. Of course, Dalberg, being a player from Oregon, might only just be becoming known to the wider circles of chess. And, as all biographers are well aware – “Typos happens”.
(On the other hand, the publisher’s of the WCL might be aware of the Latvian propensity to use the “s” in the Latvian masculine nominative, and applied the necessary corrections?!)
Consider a feature article from the same publication just five years later:
Aha! Now, as a featured article the name is properly rendered – it’s Dalbergs y’all!
And here is my efforts with photoshop to slightly (ever so-slightly) improvement Dalbergs’ photograph.