Ruben

Also of English usage.
In the USA, this particular spelling is more popular than Reuben.
https://www.behindthename.com/name/ruben/top/united-states?compare=reuben

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The 'original' spelling of 'Reuben' has only about 31k boys with the name in the USA in total according to the USA Social Security Administration since 2021.
https://www.names.org/n/reuben/about
https://www.nancy.cc/baby-name/reuben

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This 'variant' Ruben is way more popular with 115k boys with the name in the USA in total according to the USA Social Security Administration since 2021.
https://www.names.org/n/ruben/about
https://www.nancy.cc/baby-name/ruben

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This spelling is also used in the UK and Australia—but the spelling of Reuben is more popular in the UK and Australia.
https://www.behindthename.com/name/ruben/top/england-wales?compare=reuben
https://www.behindthename.com/name/ruben/top/northern-ireland?compare=reuben
https://www.behindthename.com/name/ruben/top/scotland?compare=reuben
https://www.behindthename.com/name/ruben/top/australia-nsw?compare=reuben
https://www.behindthename.com/name/ruben/top/new-zealand?compare=reuben

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I also fount several English bearers of this name.
https://en.wikipedia.org/wiki/Ruben_Loftus-Cheek
https://en.wikipedia.org/wiki/Ruben_Studdard
https://en.wikipedia.org/wiki/Ruben_Gallego
https://en.wikipedia.org/wiki/Ruben_Fleischer
https://en.wikipedia.org/wiki/Ruben_Santiago-Hudson
https://en.wikipedia.org/wiki/Ruben_Patterson

Also German, but mainly restricted to the Bible and rare in real life. [noted -ed]

Also a variant of Robin in several languages, most of them Celtic.

It is also the Italian form as well.
https://it.wikipedia.org/wiki/Ruben_(Bibbia) [noted -ed]

Ruben is also often used as an equivalent of Robert. There have been people named Ruben who anglicised their name as Robert.

Also used in Hungary. Pronounced: RUW-ben.

Ruben is also the Armenian and Georgian form of Reuben. In Armenia, the name is commonly used, while in Georgia it is rare.

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In Georgian, Ruben is written as: რუბენ.

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In Armenian, Ruben is written as: Ռուբեն.

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Note that the letters 'ո' and 'ւ' become an 'u' when next together. Refer to the Armenian alphabet article on Wikipedia for more information about that. [noted -ed]

This is also the French spelling of the name. [noted -ed]