No, Ukrainian president Volodymyr Zelenskyy and Hungarian-born billionaire George Soros are not related – Africa Check
As a number of other fact-checking organisations have made clear, there is no evidence that Soros and Zelenskyy are cousins or that a spokesperson from the DOD confirmed this.
We could also find no evidence of any statement mentioning the two men in the DOD's press releases or on its social media accounts.