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You can find Croía and Vilgot in the user-submitted database:

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https://www.behindthename.com/name/croi10a/submitted
https://www.behindthename.com/name/vilgot/submitted

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As for the Turkish double names...
Whether or not double names appear on a country's lists depends on who is compiling the data. For example, in the US the SSA removes hyphens and spaces from the data, so that Julie-Anne, Julie Anne, and Julieanne are counted as a single entry. The Turkish data does not remove spaces. Double names are evidently quite common there. You can also see double names on the Spanish and Mexican popularity lists.