Here are some options depending on the context:
* For a man:
* Mr (formal, but not common in Welsh): "Mr" is sometimes used, especially in formal settings, but it's not the most common way to address someone.
* Y[name] (most common): You would simply use the man's name preceded by "Y" (pronounced "ee") for "the" in Welsh.
* [Title] [Name]: For example, "Doctor Jones", "Professor Williams", "Mr Jones" (less common), "Sir Jones" (if he's a knight).
* For a woman:
* Ms (formal): "Ms" is becoming more common, especially in formal settings.
* Mrs [Last Name]: This is used when referring to a married woman.
* Miss [Last Name]: This is used when referring to an unmarried woman.
* [Title] [Name]: For example, "Doctor Jones", "Professor Williams", "Ms Jones".
Example:
Instead of "Mr. Jones," you would say "Y Jones" (pronounced "ee Jones") in Welsh.
Remember, using titles in Welsh is more about conveying respect and formality than having a direct equivalent of "Mr".