Is Brightman a Jewish name

Answer 1

No it is not. The surname is known in Bedfordshire in England as early as the 15th century.

Like many English surnames, migrant Jews adopted this name, because it may have been similar to their own Jewish surname, in an attempt to hide their origins and escape prejudice. Because the name is an uncommon English surname, the number of Jewish descendents is now significant enough for people to assume it is a Jewish name. This is particularly true within parts of the USA, such New England, where natrualised migrants were Jewish families rather than "real" Brightmans of Enlish origins.