Bror used to be a name that was never given to the oldest son of a family. From the 19th century, the literal meaning of the name has not been as important and the name could be given to any son. Bror was a very common name in Sweden during the first decades of the 20th century. It has since been less common. It is also in fairly common use in Finland, Denmark and Norway.
Name day: 5 October in Sweden, 9 January in Swedish speaking Finland, none in Norway.