This is a summary of the evolution of names of the current professional Major League Baseball teams in the National League (organized 1876) and subsequent rival American League (established 1901), and also of selected former major and minor league teams whose names were influential, long-lasting, or both. The sources of the names included club names, team colors, and city symbols. The names have sometimes been dubbed by the media, other times through conscious advertising marketing by the team, or sometimes a little of both.