Formal:
* Бернард (Bernard) - This is the direct transliteration of the name, commonly used in formal settings.
Informal:
* Берни (Berni) - A shorter, informal version of Bernard, often used among friends.
* Боря (Borya) - A common nickname for people named "Борис" (Boris), which has a similar sound to "Bernard." This nickname is informal and friendly.
Other options:
* Бен (Ben) - A shortened version of "Бенджамин" (Benjamin), which could be used as a nickname for Bernard.
Ultimately, the best translation will depend on the specific context and your intended audience.